$FSFG
First Savings Financial Group, Inc. Stock $fsfg

$fsfg Overview Financials Valuation SEC Filings Company Website

2018 Q3 Form 10-K Financial Statement

#000114420418064613 Filed on December 14, 2018

Income Statement

Concept	2018 Q3	2018 Q2	2018
Revenue	$11.38M	$11.21M	$42.16M
YoY Change	26.13%	29.34%	24.3%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization			$1.400M
YoY Change			16.67%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$1.842M	$1.699M	$6.337M
YoY Change	44.93%	50.09%	42.18%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$3.710M	$4.373M	$14.76M
YoY Change	16.7%	44.37%	24.72%
Income Tax	$1.359M	$748.0K	$2.422M
% Of Pretax Income	36.63%	17.1%	16.41%
Net Earnings	$2.944M	$3.677M	$10.90M
YoY Change	25.87%	50.51%	17.06%
Net Earnings / Revenue	25.87%	32.81%	25.86%
Basic Earnings Per Share	$0.76	$0.63	$4.83
Diluted Earnings Per Share	$1.15	$0.62	$4.60
COMMON SHARES
Basic Shares Outstanding	2.292M shares	2.275M shares	2.258M
Diluted Shares Outstanding		2.379M shares	2.373M

Balance Sheet

Concept	2018 Q3	2018 Q2	2018
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$42.27M	$38.00M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$13.01M	$12.61M	$13.00M
YoY Change	15.47%		15.04%
Goodwill	$9.848M	$9.511M
YoY Change	24.09%
Intangibles	$1.727M	$2.463M
YoY Change	149.21%
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$1.034B	$1.035B	$1.034B
YoY Change	16.08%	18.45%	16.08%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable			$700.0K
YoY Change			133.33%
Accrued Expenses			$10.10M
YoY Change			31.17%
Deferred Revenue
YoY Change
Short-Term Debt			$1.400M
YoY Change			7.69%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities			$10.80M
YoY Change			35.0%
LONG-TERM LIABILITIES
Long-Term Debt			$19.70M
YoY Change
Other Long-Term Liabilities			$1.200M
YoY Change			0.0%
Total Long-Term Liabilities			$20.90M
YoY Change			1641.67%
TOTAL LIABILITIES
Total Short-Term Liabilities			$10.80M
Total Long-Term Liabilities			$20.90M
Total Liabilities	$934.2M	$936.5M	$935.6M
YoY Change	17.06%		17.24%
SHAREHOLDERS EQUITY
Retained Earnings	$76.52M	$74.12M
YoY Change	13.23%
Common Stock	$27.66M	$27.64M
YoY Change	-0.6%	-0.52%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$5.269M	$5.269M
YoY Change	-10.36%	-10.36%
Treasury Stock Shares	$268.9K	268.9K shares
Shareholders Equity	$98.81M	$97.64M	$98.80M
YoY Change
Total Liabilities & Shareholders Equity	$1.034B	$1.035B	$1.034B
YoY Change	16.08%	18.45%	16.08%

Cashflow Statement

Concept	2018 Q3	2018 Q2	2018
OPERATING ACTIVITIES
Net Income	$2.944M	$3.677M	$10.90M
YoY Change	25.87%	50.51%	17.06%
Depreciation, Depletion And Amortization			$1.400M
YoY Change			16.67%
Cash From Operating Activities			$17.97M
YoY Change			-905.97%
INVESTING ACTIVITIES
Capital Expenditures			$1.594M
YoY Change			274.18%
Acquisitions
YoY Change
Other Investing Activities			-$48.90M
YoY Change			-37.15%
Cash From Investing Activities			-$50.49M
YoY Change			-35.46%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$46.00K
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities			40.54M
YoY Change			-52.52%
NET CHANGE
Cash From Operating Activities			17.97M
Cash From Investing Activities			-50.49M
Cash From Financing Activities			40.54M
Net Change In Cash			8.015M
YoY Change			63.01%
FREE CASH FLOW
Cash From Operating Activities			$17.97M
Capital Expenditures			$1.594M
Free Cash Flow			$16.37M
YoY Change			-716.61%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2018Q3	us-gaap	Cash And Due From Banks CashAndDueFromBanks	14191000	USD
CY2017Q3	us-gaap	Cash And Due From Banks CashAndDueFromBanks	11017000	USD
CY2018Q3	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	28083000	USD
CY2017Q3	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	23242000	USD
CY2018Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	42274000	USD
CY2017Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	34259000	USD
CY2018Q3	us-gaap	Time Deposits At Carrying Value TimeDepositsAtCarryingValue	2501000	USD
CY2017Q3	us-gaap	Time Deposits At Carrying Value TimeDepositsAtCarryingValue	2435000	USD
CY2018Q3	us-gaap	Trading Securities TradingSecurities	0	USD
CY2017Q3	us-gaap	Trading Securities TradingSecurities	7175000	USD
CY2018Q3	us-gaap	Available For Sale Securities AvailableForSaleSecurities	184373000	USD
CY2017Q3	us-gaap	Available For Sale Securities AvailableForSaleSecurities	178099000	USD
CY2018Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	2607000	USD
CY2017Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	2878000	USD
CY2018Q3	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group Mortgage LoansReceivableHeldForSaleNetNotPartOfDisposalGroupMortgage	10466000	USD
CY2017Q3	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group Mortgage LoansReceivableHeldForSaleNetNotPartOfDisposalGroupMortgage	727000	USD
CY2018Q3	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group Other LoansReceivableHeldForSaleNetNotPartOfDisposalGroupOther	21659000	USD
CY2017Q3	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group Other LoansReceivableHeldForSaleNetNotPartOfDisposalGroupOther	24908000	USD
CY2018Q3	us-gaap	Loans Receivable Net LoansReceivableNet	704271000	USD
CY2017Q3	us-gaap	Loans Receivable Net LoansReceivableNet	586456000	USD
CY2018Q3	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	9621000	USD
CY2017Q3	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	6936000	USD
CY2018Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	13013000	USD
CY2017Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	11270000	USD
CY2018Q3	us-gaap	Real Estate Investments Other RealEstateInvestmentsOther	103000	USD
CY2017Q3	us-gaap	Real Estate Investments Other RealEstateInvestmentsOther	852000	USD
CY2018Q3	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	1600000	USD
CY2017Q3	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	1491000	USD
CY2018Q3	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	19966000	USD
CY2017Q3	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	18297000	USD
CY2018Q3	us-gaap	Goodwill Goodwill	9848000	USD
CY2017Q3	us-gaap	Goodwill Goodwill	7936000	USD
CY2018Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1727000	USD
CY2017Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	693000	USD
CY2018Q3	us-gaap	Other Assets OtherAssets	7690000	USD
CY2017Q3	us-gaap	Other Assets OtherAssets	4814000	USD
CY2018Q3	us-gaap	Assets Assets	1034406000	USD
CY2017Q3	us-gaap	Assets Assets	891133000	USD
CY2018Q3	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	643407000	USD
CY2017Q3	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	573099000	USD
CY2018Q3	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	1352000	USD
CY2017Q3	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	1348000	USD
CY2018Q3	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	90000000	USD
CY2017Q3	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	118065000	USD
CY2018Q3	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	743000	USD
CY2017Q3	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	283000	USD
CY2018Q3	us-gaap	Advance Payments By Borrowers For Taxes And Insurance AdvancePaymentsByBorrowersForTaxesAndInsurance	1218000	USD
CY2017Q3	us-gaap	Advance Payments By Borrowers For Taxes And Insurance AdvancePaymentsByBorrowersForTaxesAndInsurance	1212000	USD
CY2018Q3	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	10075000	USD
CY2017Q3	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	7728000	USD
CY2018Q3	us-gaap	Liabilities Liabilities	934161000	USD
CY2017Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	4158000	USD
CY2018Q3	us-gaap	Deferred Compensation Equity DeferredCompensationEquity	479000	USD
CY2017Q3	us-gaap	Deferred Compensation Equity DeferredCompensationEquity	571000	USD
CY2017Q3	us-gaap	Liabilities Liabilities	798018000	USD
CY2018Q3	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2017Q3	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2018Q3	us-gaap	Common Stock Value CommonStockValue	26000	USD
CY2017Q3	us-gaap	Common Stock Value CommonStockValue	25000	USD
CY2018Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	27630000	USD
CY2017Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	27798000	USD
CY2018Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	76523000	USD
CY2017Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	67583000	USD
CY2018Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	382000	USD
CY2018Q3	us-gaap	Treasury Stock Value TreasuryStockValue	5269000	USD
CY2017Q3	us-gaap	Treasury Stock Value TreasuryStockValue	5878000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	98813000	USD
CY2017Q3	us-gaap	Stockholders Equity StockholdersEquity	93115000	USD
CY2018Q3	us-gaap	Minority Interest MinorityInterest	1432000	USD
CY2017Q3	us-gaap	Minority Interest MinorityInterest	0	USD
CY2018Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	100245000	USD
CY2017Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	93115000	USD
CY2018Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1034406000	USD
CY2017Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	891133000	USD
CY2018Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2017Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2018Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2017Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2018Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2017Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2018Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	20000000	shares
CY2017Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	20000000	shares
CY2018Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	2560907	shares
CY2018Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	2292021	shares
CY2018Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	268886	shares
CY2018Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	9323000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	8092000	USD
CY2018	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	34057000	USD
CY2017	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	27093000	USD
CY2016	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	22876000	USD
CY2018	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	3650000	USD
CY2017	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	3315000	USD
CY2016	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	3691000	USD
CY2018	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	3551000	USD
CY2017	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	3012000	USD
CY2016	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	2470000	USD
CY2018	us-gaap	Dividend Income Operating DividendIncomeOperating	465000	USD
CY2017	us-gaap	Dividend Income Operating DividendIncomeOperating	313000	USD
CY2016	us-gaap	Dividend Income Operating DividendIncomeOperating	310000	USD
CY2018	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	436000	USD
CY2017	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	184000	USD
CY2016	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	109000	USD
CY2018	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	42159000	USD
CY2017	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	33917000	USD
CY2016	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	29456000	USD
CY2018	us-gaap	Interest Expense Deposits InterestExpenseDeposits	4279000	USD
CY2017	us-gaap	Interest Expense Deposits InterestExpenseDeposits	2762000	USD
CY2016	us-gaap	Interest Expense Deposits InterestExpenseDeposits	2490000	USD
CY2018	us-gaap	Interest Expense Federal Funds Purchased InterestExpenseFederalFundsPurchased	0	USD
CY2017	us-gaap	Interest Expense Federal Funds Purchased InterestExpenseFederalFundsPurchased	23000	USD
CY2016	us-gaap	Interest Expense Federal Funds Purchased InterestExpenseFederalFundsPurchased	1000	USD
CY2018	us-gaap	Interest Expense Securities Sold Under Agreements To Repurchase InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase	3000	USD
CY2017	us-gaap	Interest Expense Securities Sold Under Agreements To Repurchase InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase	3000	USD
CY2016	us-gaap	Interest Expense Securities Sold Under Agreements To Repurchase InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase	3000	USD
CY2018	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	2022000	USD
CY2017	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	1669000	USD
CY2016	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	1512000	USD
CY2018	us-gaap	Interest Expense InterestExpense	6337000	USD
CY2017	us-gaap	Interest Expense InterestExpense	4457000	USD
CY2016	us-gaap	Interest Expense InterestExpense	4167000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	35822000	USD
CY2017	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	29460000	USD
CY2016	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	25289000	USD
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1353000	USD
CY2017	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1301000	USD
CY2016	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	637000	USD
CY2018	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	34469000	USD
CY2017	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	28159000	USD
CY2016	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	24652000	USD
CY2018	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	430000	USD
CY2017	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	433000	USD
CY2016	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	448000	USD
CY2018	us-gaap	Noninterest Income Other NoninterestIncomeOther	0	USD
CY2017	us-gaap	Noninterest Income Other NoninterestIncomeOther	189000	USD
CY2016	us-gaap	Noninterest Income Other NoninterestIncomeOther	0	USD
CY2018	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	531000	USD
CY2017	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	145000	USD
CY2016	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	85000	USD
CY2018	us-gaap	Noninterest Income NoninterestIncome	13295000	USD
CY2017	us-gaap	Noninterest Income NoninterestIncome	8625000	USD
CY2016	us-gaap	Noninterest Income NoninterestIncome	3372000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	19730000	USD
CY2017	us-gaap	Labor And Related Expense LaborAndRelatedExpense	15089000	USD
CY2016	us-gaap	Labor And Related Expense LaborAndRelatedExpense	12858000	USD
CY2018	us-gaap	Occupancy Net OccupancyNet	3629000	USD
CY2017	us-gaap	Occupancy Net OccupancyNet	2788000	USD
CY2016	us-gaap	Occupancy Net OccupancyNet	2698000	USD
CY2018	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2425000	USD
CY2017	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1357000	USD
CY2016	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1587000	USD
CY2018	us-gaap	Advertising Expense AdvertisingExpense	808000	USD
CY2018	us-gaap	Trading Securities Realized Gain Loss TradingSecuritiesRealizedGainLoss	43000	USD
CY2017	us-gaap	Trading Securities Realized Gain Loss TradingSecuritiesRealizedGainLoss	200000	USD
CY2016	us-gaap	Trading Securities Realized Gain Loss TradingSecuritiesRealizedGainLoss	748000	USD
CY2018	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	5493000	USD
CY2017	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	4204000	USD
CY2016	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	715000	USD
CY2018	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	25000	USD
CY2017	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	38000	USD
CY2016	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	168000	USD
CY2018	fsfg	Business Acquisitions Pro Forma Interest Income Expense Net BusinessAcquisitionsProFormaInterestIncomeExpenseNet	36777000	USD
CY2017	fsfg	Business Acquisitions Pro Forma Interest Income Expense Net BusinessAcquisitionsProFormaInterestIncomeExpenseNet	32309000	USD
CY2016	fsfg	Business Acquisitions Pro Forma Interest Income Expense Net BusinessAcquisitionsProFormaInterestIncomeExpenseNet	28062000	USD
CY2018	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	13149000	USD
CY2017	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	10142000	USD
CY2016	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	7472000	USD
CY2018	fsfg	Business Acquisitions Pro Forma Net Income Loss Available To Common Stockholders Basic BusinessAcquisitionsProFormaNetIncomeLossAvailableToCommonStockholdersBasic	11715000	USD
CY2017	fsfg	Business Acquisitions Pro Forma Net Income Loss Available To Common Stockholders Basic BusinessAcquisitionsProFormaNetIncomeLossAvailableToCommonStockholdersBasic	10142000	USD
CY2016	fsfg	Business Acquisitions Pro Forma Net Income Loss Available To Common Stockholders Basic BusinessAcquisitionsProFormaNetIncomeLossAvailableToCommonStockholdersBasic	7472000	USD
CY2018	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	5.19
CY2017	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	4.57
CY2016	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	3.40
CY2018	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	4.94
CY2017	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	4.32
CY2016	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	3.24
CY2017	us-gaap	Advertising Expense AdvertisingExpense	538000	USD
CY2016	us-gaap	Advertising Expense AdvertisingExpense	545000	USD
CY2018	us-gaap	Professional Fees ProfessionalFees	1786000	USD
CY2017	us-gaap	Professional Fees ProfessionalFees	1527000	USD
CY2016	us-gaap	Professional Fees ProfessionalFees	1259000	USD
CY2018	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	580000	USD
CY2017	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	490000	USD
CY2016	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	502000	USD
CY2018	us-gaap	Profit Loss From Real Estate Operations ProfitLossFromRealEstateOperations	160000	USD
CY2017	us-gaap	Profit Loss From Real Estate Operations ProfitLossFromRealEstateOperations	113000	USD
CY2016	us-gaap	Profit Loss From Real Estate Operations ProfitLossFromRealEstateOperations	-28000	USD
CY2018	us-gaap	Other Noninterest Expense OtherNoninterestExpense	4208000	USD
CY2017	us-gaap	Other Noninterest Expense OtherNoninterestExpense	3275000	USD
CY2016	us-gaap	Other Noninterest Expense OtherNoninterestExpense	2958000	USD
CY2018	us-gaap	Noninterest Expense NoninterestExpense	33006000	USD
CY2017	us-gaap	Noninterest Expense NoninterestExpense	24951000	USD
CY2016	us-gaap	Noninterest Expense NoninterestExpense	22435000	USD
CY2018Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	2896000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	14758000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	11833000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	5589000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2422000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2520000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-2322000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1434000	USD
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2016	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	10902000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	9313000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	7911000	USD
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2372554	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2346008	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2303628	shares
CY2018Q3	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	183861000	USD
CY2018Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	2826000	USD
CY2017Q3	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	171666000	USD
CY2017Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	6789000	USD
CY2018Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	2314000	USD
CY2018Q3	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	184373000	USD
CY2018Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	289000	USD
CY2018Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2017Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	356000	USD
CY2017Q3	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	178099000	USD
CY2017Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	428000	USD
CY2017Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2017Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	3306000	USD
CY2018Q3	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	713345000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	594339000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	5888000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	5956000	USD
CY2018Q3	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	240000	USD
CY2018Q3	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	266000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	15975000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	16299000	USD
CY2018Q3	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	1003000	USD
CY2018Q3	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	1116000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	27145000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	27574000	USD
CY2018Q3	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	902000	USD
CY2018Q3	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	1009000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	88136000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	88159000	USD
CY2018Q3	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	328000	USD
CY2018Q3	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	363000	USD
CY2018Q3	fsfg	Number Of Securities Continuous Unrealized Loss Position Less Than Twelve Months NumberOfSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonths	112000	pure
CY2018Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	61536000	USD
CY2018Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	1311000	USD
CY2018Q3	fsfg	Number Of Investment Positions With Unrealized Losses NumberOfInvestmentPositionsWithUnrealizedLosses	142000	Number
CY2018Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	85460000	USD
CY2018Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	2314000	USD
CY2017Q3	fsfg	Number Of Securities Continuous Unrealized Loss Position Less Than Twelve Months NumberOfSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonths	32000	pure
CY2017Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	29029000	USD
CY2017Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	322000	USD
CY2017Q3	fsfg	Number Of Investment Positions With Unrealized Losses NumberOfInvestmentPositionsWithUnrealizedLosses	37000	Number
CY2017Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	33059000	USD
CY2017Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	356000	USD
CY2018Q3	fsfg	Number Of Securities Continuous Unrealized Loss Position More Than Twelve Months NumberOfSecuritiesContinuousUnrealizedLossPositionMoreThanTwelveMonths	30000	Number
CY2018Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	23924000	USD
CY2018Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1003000	USD
CY2017Q3	fsfg	Number Of Securities Continuous Unrealized Loss Position More Than Twelve Months NumberOfSecuritiesContinuousUnrealizedLossPositionMoreThanTwelveMonths	5000	Number
CY2017Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	4030000	USD
CY2017Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	34000	USD
CY2018Q3	fsfg	Percent Of Total Unrealized Loss Total Amortized Cost Basis PercentOfTotalUnrealizedLossTotalAmortizedCostBasis	0.0311	pure
CY2018Q3	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	37000	USD
CY2018Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	9323000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	8092000	USD
CY2018Q3	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	704271000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	586456000	USD
CY2018Q3	us-gaap	Principal Amount Outstanding On Loans Managed And Securitized PrincipalAmountOutstandingOnLoansManagedAndSecuritized	713345000	USD
CY2018Q3	fsfg	Interest Receivable Loans Receivable InterestReceivableLoansReceivable	2687000	USD
CY2018Q3	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	249000	USD
CY2018Q3	us-gaap	Notes Receivable Net NotesReceivableNet	716281000	USD
CY2018Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	13327000	USD
CY2018Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	702954000	USD
CY2017Q3	us-gaap	Principal Amount Outstanding On Loans Managed And Securitized PrincipalAmountOutstandingOnLoansManagedAndSecuritized	594339000	USD
CY2017Q3	fsfg	Interest Receivable Loans Receivable InterestReceivableLoansReceivable	1907000	USD
CY2017Q3	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	209000	USD
CY2017Q3	us-gaap	Notes Receivable Net NotesReceivableNet	596455000	USD
CY2017Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	10864000	USD
CY2017Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	585591000	USD
CY2018Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	511000	USD
CY2018Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	8812000	USD
CY2017Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	23000	USD
CY2017Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	8069000	USD
CY2017Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8092000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	1353000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	321000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	199000	USD
CY2018Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	9323000	USD
CY2016Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	7122000	USD
CY2017	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	1301000	USD
CY2017	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	485000	USD
CY2017	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	154000	USD
CY2015Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	6624000	USD
CY2016	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	637000	USD
CY2016	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	325000	USD
CY2016	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	186000	USD
CY2018Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	11781000	USD
CY2018Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	12392000	USD
CY2018	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	12241000	USD
CY2018	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	471000	USD
CY2018Q3	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	1546000	USD
CY2018Q3	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	1703000	USD
CY2018Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	511000	USD
CY2018	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	708000	USD
CY2018	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	0	USD
CY2018Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	13327000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	10539000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	10949000	USD
CY2017	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	10945000	USD
CY2017	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	359000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	325000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	369000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	23000	USD
CY2017	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	518000	USD
CY2017	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	0	USD
CY2017Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	10864000	USD
CY2016Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	10836000	USD
CY2016Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	11202000	USD
CY2016	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	12136000	USD
CY2016	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	351000	USD
CY2016Q3	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	525000	USD
CY2016Q3	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	524000	USD
CY2016Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	48000	USD
CY2016	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	165000	USD
CY2016	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	0	USD
CY2016Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	11361000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-5649000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-2743000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	2631000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-1257000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-977000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	897000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-4395000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1786000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1734000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	7941000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	7527000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	9645000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	1434000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	0	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	0	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	6507000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	7527000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	9645000	USD
CY2018Q3	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	4991000	USD
CY2017Q3	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	5588000	USD
CY2018Q3	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	711290000	USD
CY2017Q3	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	590867000	USD
CY2018Q3	fsfg	Financing Receivable Modifications Recorded Investment Accruing FinancingReceivableModificationsRecordedInvestmentAccruing	9145000	USD
CY2018Q3	fsfg	Financing Receivable Modifications Recorded Investment Nonaccrual FinancingReceivableModificationsRecordedInvestmentNonaccrual	86000	USD
CY2018Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	9231000	USD
CY2017Q3	fsfg	Financing Receivable Modifications Recorded Investment Accruing FinancingReceivableModificationsRecordedInvestmentAccruing	7041000	USD
CY2017Q3	fsfg	Financing Receivable Modifications Recorded Investment Nonaccrual FinancingReceivableModificationsRecordedInvestmentNonaccrual	1360000	USD
CY2017Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	8401000	USD
CY2014Q4	us-gaap	Other Assets OtherAssets	4200000	USD
CY2014Q4	fsfg	Percentage Of Received Equity Interest PercentageOfReceivedEquityInterest	0.99	pure
CY2014Q4	fsfg	Percentage Of Receive Operating Profit And Losses PercentageOfReceiveOperatingProfitAndLosses	0.99	pure
CY2014Q4	fsfg	Investment Credit Available To Be Estimated InvestmentCreditAvailableToBeEstimated	4700000	USD
CY2017Q1	fsfg	Historical Tax Credit On Investment HistoricalTaxCreditOnInvestment	5000000	USD
CY2017Q1	fsfg	Increase In Equity Investment IncreaseInEquityInvestment	4500000	USD
CY2017Q1	fsfg	Investment Tax Credit Percentage InvestmentTaxCreditPercentage	0.9	pure
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2258020	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2219088	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2200258	shares
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.83
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.20
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.57
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	10902000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	9313000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	7849000	USD
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	107274	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	123557	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	103370	shares
CY2018	fsfg	Incremental Common Shares Attributable To Restricted Stock IncrementalCommonSharesAttributableToRestrictedStock	7260	shares
CY2017	fsfg	Incremental Common Shares Attributable To Restricted Stock IncrementalCommonSharesAttributableToRestrictedStock	3363	shares
CY2016	fsfg	Incremental Common Shares Attributable To Restricted Stock IncrementalCommonSharesAttributableToRestrictedStock	0	shares
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	2372554	shares
CY2017	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	2346008	shares
CY2016	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	2303628	shares
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.60
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.97
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.41
CY2015Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	94357000	USD
CY2016	us-gaap	Profit Loss ProfitLoss	7911000	USD
CY2016	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1110000	USD
CY2016	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	348000	USD
CY2016	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	179000	USD
CY2016Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	86580000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	9313000	USD
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1229000	USD
CY2017	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	176000	USD
CY2017	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	355000	USD
CY2017	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	294000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	12336000	USD
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1343000	USD
CY2018	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	217000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	750000	USD
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	433000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	5873000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	4400000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	4218000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1759000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-598000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	743000	USD
CY2018	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	133000	USD
CY2017	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	703000	USD
CY2016	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	648000	USD
CY2018	fsfg	Proceeds From Sale Of Foreclosed Real Estate Financed Through Loans ProceedsFromSaleOfForeclosedRealEstateFinancedThroughLoans	453000	USD
CY2016	us-gaap	Stock Issued1 StockIssued1	179000	USD
CY2018	us-gaap	Servicing Asset At Fair Value Other Changes In Fair Value ServicingAssetAtFairValueOtherChangesInFairValue	-372000	USD
CY2017	fsfg	Proceeds From Sale Of Foreclosed Real Estate Financed Through Loans ProceedsFromSaleOfForeclosedRealEstateFinancedThroughLoans	189000	USD
CY2016	fsfg	Proceeds From Sale Of Foreclosed Real Estate Financed Through Loans ProceedsFromSaleOfForeclosedRealEstateFinancedThroughLoans	299000	USD
CY2018	us-gaap	Stock Issued1 StockIssued1	387000	USD
CY2017	us-gaap	Stock Issued1 StockIssued1	294000	USD
CY2018Q3	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	14095000	USD
CY2018	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	12949000	USD
CY2018	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	471000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	11318000	USD
CY2017	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	11463000	USD
CY2017	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	359000	USD
CY2016Q3	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	11726000	USD
CY2016	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	12301000	USD
CY2016	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	351000	USD
CY2018Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	4182000	USD
CY2018Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	91000	USD
CY2018Q3	fsfg	Financing Receivable Recorded Investment Nonperforming FinancingReceivableRecordedInvestmentNonperforming	4273000	USD
CY2017Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	3823000	USD
CY2017Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	93000	USD
CY2017Q3	fsfg	Financing Receivable Recorded Investment Nonperforming FinancingReceivableRecordedInvestmentNonperforming	3916000	USD
CY2018	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	4	Number
CY2018	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	1987000	USD
CY2018	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	1967000	USD
CY2017	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	5	Number
CY2017	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	840000	USD
CY2017	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	842000	USD
CY2016	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	9	Number
CY2016	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	461000	USD
CY2016	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	594000	USD
CY2017Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	1389000	USD
CY2016Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	310000	USD
CY2015Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	0	USD
CY2018	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	1565000	USD
CY2017	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	1188000	USD
CY2016	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	345000	USD
CY2017	us-gaap	Servicing Asset At Fair Value Other Changes In Fair Value ServicingAssetAtFairValueOtherChangesInFairValue	-109000	USD
CY2016	us-gaap	Servicing Asset At Fair Value Other Changes In Fair Value ServicingAssetAtFairValueOtherChangesInFairValue	-35000	USD
CY2018	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs	-177000	USD
CY2017	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs	0	USD
CY2016	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs	0	USD
CY2018Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	2405000	USD
CY2018Q3	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	1000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	17000	USD
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	4800	shares
CY2018	us-gaap	Gain Loss On Investments GainLossOnInvestments	-585000	USD
CY2017	us-gaap	Gain Loss On Investments GainLossOnInvestments	226000	USD
CY2016	us-gaap	Gain Loss On Investments GainLossOnInvestments	4236000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-4392000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-1766000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1734000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	99000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	30000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	26000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	10000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	73000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	20000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2018	us-gaap	Other Comprehensive Loss Held To Maturity Security Reclassification Adjustment From Aoci For Noncredit Portion Of Otti Tax OtherComprehensiveLossHeldToMaturitySecurityReclassificationAdjustmentFromAociForNoncreditPortionOfOttiTax	25000	USD
CY2017	us-gaap	Other Comprehensive Loss Held To Maturity Security Reclassification Adjustment From Aoci For Noncredit Portion Of Otti Tax OtherComprehensiveLossHeldToMaturitySecurityReclassificationAdjustmentFromAociForNoncreditPortionOfOttiTax	0	USD
CY2016	us-gaap	Other Comprehensive Loss Held To Maturity Security Reclassification Adjustment From Aoci For Noncredit Portion Of Otti Tax OtherComprehensiveLossHeldToMaturitySecurityReclassificationAdjustmentFromAociForNoncreditPortionOfOttiTax	0	USD
CY2018	us-gaap	Other Comprehensive Loss Held To Maturity Security Otti After Adjustments Tax OtherComprehensiveLossHeldToMaturitySecurityOttiAfterAdjustmentsTax	70000	USD
CY2017	us-gaap	Other Comprehensive Loss Held To Maturity Security Otti After Adjustments Tax OtherComprehensiveLossHeldToMaturitySecurityOttiAfterAdjustmentsTax	0	USD
CY2016	us-gaap	Other Comprehensive Loss Held To Maturity Security Otti After Adjustments Tax OtherComprehensiveLossHeldToMaturitySecurityOttiAfterAdjustmentsTax	0	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1373000	USD
CY2016	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1461000	USD
CY2018	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-235000	USD
CY2016	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-553000	USD
CY2018	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	115065000	USD
CY2016	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	27572000	USD
CY2018	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	115980000	USD
CY2016	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	28797000	USD
CY2018	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	215000	USD
CY2016	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	49000	USD
CY2018	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	-585000	USD
CY2016	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	4236000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	235000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2431000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	628000	USD
CY2018	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	562000	USD
CY2016	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	151000	USD
CY2018	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	459000	USD
CY2016	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	9000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-3085000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	1001000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	17965000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	9365000	USD
CY2018	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	-980000	USD
CY2016	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	-245000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	50020000	USD
CY2016	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	15659000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Mortgage Backed Securities Mbs ProceedsFromMaturitiesPrepaymentsAndCallsOfMortgageBackedSecuritiesMBS	16875000	USD
CY2016	us-gaap	Proceeds From Maturities Prepayments And Calls Of Mortgage Backed Securities Mbs ProceedsFromMaturitiesPrepaymentsAndCallsOfMortgageBackedSecuritiesMBS	14894000	USD
CY2018	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	85798000	USD
CY2016	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	52721000	USD
CY2018	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	2562000	USD
CY2016	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	216000	USD
CY2018	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	6667000	USD
CY2016	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	0	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-50492000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-45332000	USD
CY2018	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	49965000	USD
CY2016	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	46170000	USD
CY2018	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	4000	USD
CY2016	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	3000	USD
CY2018	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	234500000	USD
CY2016	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	25000000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	362000	USD
CY2016	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	169000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1343000	USD
CY2016	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1110000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	40542000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	40315000	USD
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	8015000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	4348000	USD
CY2015Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	24994000	USD
CY2016Q3	us-gaap	Assets Assets	796516000	USD
CY2018Q3	us-gaap	Other Borrowings OtherBorrowings	19661000	USD
CY2017Q3	us-gaap	Other Borrowings OtherBorrowings	0	USD
CY2018Q3	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	9952000	USD
CY2018	fsfg	Atm And Interchange Fees ATMAndInterchangeFees	1580000	USD
CY2017	fsfg	Atm And Interchange Fees ATMAndInterchangeFees	1348000	USD
CY2016	fsfg	Atm And Interchange Fees ATMAndInterchangeFees	1073000	USD
CY2018	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	99000	USD
CY2017	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	30000	USD
CY2016	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	0	USD
CY2018	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	95000	USD
CY2017	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	USD
CY2016	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	USD
CY2018	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	2318000	USD
CY2017	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	530000	USD
CY2016	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	430000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	USD
CY2016	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	1862000	USD
CY2018	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	0	USD
CY2017	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	0	USD
CY2016	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	62000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	10902000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	9313000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	7849000	USD
CY2018	us-gaap	Interest Expense Other Short Term Borrowings InterestExpenseOtherShortTermBorrowings	33000	USD
CY2017	us-gaap	Interest Expense Other Short Term Borrowings InterestExpenseOtherShortTermBorrowings	0	USD
CY2016	us-gaap	Interest Expense Other Short Term Borrowings InterestExpenseOtherShortTermBorrowings	161000	USD
CY2016	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	62000	USD
CY2016	us-gaap	Stock Issued During Period Value Employee Stock Ownership Plan StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan	701000	USD
CY2016	us-gaap	Adjustments To Additional Paid In Capital Increase In Carrying Amount Of Redeemable Preferred Stock AdjustmentsToAdditionalPaidInCapitalIncreaseInCarryingAmountOfRedeemablePreferredStock	-17120000	USD
CY2018	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	2000	USD
CY2016	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.51
CY2016	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	26210	shares
CY2016	fsfg	Preferred Stock Redemption Shares PreferredStockRedemptionShares	17120	shares
CY2016	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	4933	shares
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.55
CY2017	us-gaap	Stock Issued During Period Shares Restricted Stock Award Gross StockIssuedDuringPeriodSharesRestrictedStockAwardGross	17265	shares
CY2017	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	26858	shares
CY2017	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	6456	shares
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.59
CY2018	us-gaap	Stock Issued During Period Shares Restricted Stock Award Gross StockIssuedDuringPeriodSharesRestrictedStockAwardGross	1000	shares
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	55296	shares
CY2018	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	6729	shares
CY2017	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1164000	USD
CY2017	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-702000	USD
CY2017	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	89738000	USD
CY2017	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	75638000	USD
CY2017	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	170000	USD
CY2017	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	226000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1836000	USD
CY2017	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	592000	USD
CY2017	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	88000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-1181000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-2229000	USD
CY2017	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	-455000	USD
CY2017	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	32005000	USD
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Mortgage Backed Securities Mbs ProceedsFromMaturitiesPrepaymentsAndCallsOfMortgageBackedSecuritiesMBS	17103000	USD
CY2017	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	71583000	USD
CY2017	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	0	USD
CY2017	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	0	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-78235000	USD
CY2017	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	89915000	USD
CY2017	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	3000	USD
CY2017	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	15000000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	62000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1229000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	85381000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	4917000	USD
CY2016Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	29342000	USD
CY2018Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9426000	USD
CY2018Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10146000	USD
CY2018Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	11206000	USD
CY2018Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	11381000	USD
CY2018Q4	us-gaap	Interest Expense InterestExpense	1373000	USD
CY2018Q1	us-gaap	Interest Expense InterestExpense	1423000	USD
CY2018Q2	us-gaap	Interest Expense InterestExpense	1699000	USD
CY2018Q3	us-gaap	Interest Expense InterestExpense	1842000	USD
CY2018Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8053000	USD
CY2018Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8723000	USD
CY2018Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	9507000	USD
CY2018Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	9539000	USD
CY2018Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	462000	USD
CY2018Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	371000	USD
CY2018Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	266000	USD
CY2018Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	254000	USD
CY2018Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	7591000	USD
CY2018Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8352000	USD
CY2018Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	9241000	USD
CY2018Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	9285000	USD
CY2018Q4	us-gaap	Noninterest Income NoninterestIncome	2906000	USD
CY2018Q1	us-gaap	Noninterest Income NoninterestIncome	2567000	USD
CY2018Q2	us-gaap	Noninterest Income NoninterestIncome	3254000	USD
CY2018Q3	us-gaap	Noninterest Income NoninterestIncome	4568000	USD
CY2018Q4	us-gaap	Noninterest Expense NoninterestExpense	6382000	USD
CY2018Q1	us-gaap	Noninterest Expense NoninterestExpense	8359000	USD
CY2018Q2	us-gaap	Noninterest Expense NoninterestExpense	8122000	USD
CY2018Q3	us-gaap	Noninterest Expense NoninterestExpense	10143000	USD
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	4115000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2560000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	4373000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	3710000	USD
CY2018Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	622000	USD
CY2018Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	338000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	696000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	766000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	3493000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	2222000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	3677000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	2944000	USD
CY2018Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	87000	USD
CY2018Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	576000	USD
CY2018Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	571000	USD
CY2018Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	200000	USD
CY2018Q4	us-gaap	Profit Loss ProfitLoss	3406000	USD
CY2018Q1	us-gaap	Profit Loss ProfitLoss	1646000	USD
CY2018Q2	us-gaap	Profit Loss ProfitLoss	3106000	USD
CY2018Q3	us-gaap	Profit Loss ProfitLoss	2744000	USD
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.53
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.73
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.37
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.20
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.44
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.69
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.31
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.15
CY2018	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	-7175000	USD
CY2017	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	-2080000	USD
CY2016	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	211000	USD
CY2018	fsfg	Accretion Amortization Of Fair Value Adjustments On Loans Net AccretionAmortizationOfFairValueAdjustmentsOnLoansNet	517000	USD
CY2017	fsfg	Accretion Amortization Of Fair Value Adjustments On Loans Net AccretionAmortizationOfFairValueAdjustmentsOnLoansNet	10000	USD
CY2016	fsfg	Accretion Amortization Of Fair Value Adjustments On Loans Net AccretionAmortizationOfFairValueAdjustmentsOnLoansNet	-171000	USD
CY2018	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	7080000	USD
CY2017	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	4734000	USD
CY2016	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	1145000	USD
CY2018	fsfg	Net Gain Or Loss On Sale Of Premises Equipment And Real Estate Development NetGainOrLossOnSaleOfPremisesEquipmentAndRealEstateDevelopment	25000	USD
CY2017	fsfg	Net Gain Or Loss On Sale Of Premises Equipment And Real Estate Development NetGainOrLossOnSaleOfPremisesEquipmentAndRealEstateDevelopment	38000	USD
CY2016	fsfg	Net Gain Or Loss On Sale Of Premises Equipment And Real Estate Development NetGainOrLossOnSaleOfPremisesEquipmentAndRealEstateDevelopment	2030000	USD
CY2018	fsfg	Proceeds From Sales And Maturities Of Interestbearing Time Deposits ProceedsFromSalesAndMaturitiesOfInterestbearingTimeDeposits	4734000	USD
CY2017	fsfg	Proceeds From Sales And Maturities Of Interestbearing Time Deposits ProceedsFromSalesAndMaturitiesOfInterestbearingTimeDeposits	1120000	USD
CY2016	fsfg	Proceeds From Sales And Maturities Of Interestbearing Time Deposits ProceedsFromSalesAndMaturitiesOfInterestbearingTimeDeposits	245000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	58116000	USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	4255000	USD
CY2016	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	0	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	2625000	USD
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	3665000	USD
CY2016	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	6725000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	227000	USD
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	208000	USD
CY2016	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	1381000	USD
CY2018	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	21000	USD
CY2017	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	0	USD
CY2016	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	0	USD
CY2018	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	540000	USD
CY2017	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	USD
CY2016	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	1564000	USD
CY2018	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	0	USD
CY2017	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	344000	USD
CY2016	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	3285000	USD
CY2018	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	606000	USD
CY2017	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	208000	USD
CY2016	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	472000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1594000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	426000	USD
CY2017Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	3018000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2607000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	3029000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	3179000	USD
CY2017Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	681000	USD
CY2017Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	413000	USD
CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	586000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	353000	USD
CY2018	fsfg	Proceeds From Sale Of Premises Equipment And Real Estate Development ProceedsFromSaleOfPremisesEquipmentAndRealEstateDevelopment	51000	USD
CY2017	fsfg	Proceeds From Sale Of Premises Equipment And Real Estate Development ProceedsFromSaleOfPremisesEquipmentAndRealEstateDevelopment	19000	USD
CY2016	fsfg	Proceeds From Sale Of Premises Equipment And Real Estate Development ProceedsFromSaleOfPremisesEquipmentAndRealEstateDevelopment	1866000	USD
CY2017Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	8011000	USD
CY2017Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	8219000	USD
CY2017Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	8664000	USD
CY2017Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9023000	USD
CY2017Q4	us-gaap	Interest Expense InterestExpense	1022000	USD
CY2017Q1	us-gaap	Interest Expense InterestExpense	1032000	USD
CY2017Q2	us-gaap	Interest Expense InterestExpense	1132000	USD
CY2017Q3	us-gaap	Interest Expense InterestExpense	1271000	USD
CY2017Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	6989000	USD
CY2017Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	7187000	USD
CY2017Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	7532000	USD
CY2017Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	7752000	USD
CY2017Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	306000	USD
CY2017Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	375000	USD
CY2017Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	321000	USD
CY2017Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	299000	USD
CY2017Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	6683000	USD
CY2017Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	6812000	USD
CY2017Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	7211000	USD
CY2017Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	7453000	USD
CY2017Q4	us-gaap	Noninterest Income NoninterestIncome	1875000	USD
CY2017Q1	us-gaap	Noninterest Income NoninterestIncome	1861000	USD
CY2017Q2	us-gaap	Noninterest Income NoninterestIncome	2123000	USD
CY2017Q3	us-gaap	Noninterest Income NoninterestIncome	2766000	USD
CY2017Q4	us-gaap	Noninterest Expense NoninterestExpense	5540000	USD
CY2017Q1	us-gaap	Noninterest Expense NoninterestExpense	6066000	USD
CY2017Q2	us-gaap	Noninterest Expense NoninterestExpense	6305000	USD
CY2017Q3	us-gaap	Noninterest Expense NoninterestExpense	7040000	USD
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	840000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	2337000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	2194000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	2443000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	2339000	USD
CY2017Q4	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	0	USD
CY2017Q1	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	0	USD
CY2017Q2	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	0	USD
CY2017Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	0	USD
CY2017Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2337000	USD
CY2017Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2194000	USD
CY2017Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2443000	USD
CY2017Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2339000	USD
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.06
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.99
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.10
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.05
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.00
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.94
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.04
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.99
CY2018	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	-18065000	USD
CY2017	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	-3568000	USD
CY2016	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	6766000	USD
CY2018	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	224500000	USD
CY2017	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	15000000	USD
CY2016	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	35000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	19661000	USD
CY2017	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	USD
CY2016	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	USD
CY2018	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	0	USD
CY2017	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	0	USD
CY2016	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	4632000	USD
CY2018	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	6000	USD
CY2017	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	198000	USD
CY2016	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	131000	USD
CY2018	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	0	USD
CY2017	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	0	USD
CY2016	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	17120000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	46000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2018	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	0	USD
CY2017	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	0	USD
CY2016	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	62000	USD
CY2016Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	7126000	USD
CY2016Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	7147000	USD
CY2016Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	7422000	USD
CY2016Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	7761000	USD
CY2016Q4	us-gaap	Interest Expense InterestExpense	968000	USD
CY2016Q1	us-gaap	Interest Expense InterestExpense	1028000	USD
CY2016Q3	us-gaap	Interest Expense InterestExpense	1115000	USD
CY2016Q3	us-gaap	Interest Expense InterestExpense	1056000	USD
CY2016Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	6158000	USD
CY2016Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	6119000	USD
CY2016Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	6307000	USD
CY2016Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	6705000	USD
CY2016Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	0	USD
CY2016Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	125000	USD
CY2016Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	303000	USD
CY2016Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	209000	USD
CY2016Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	6158000	USD
CY2016Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	5994000	USD
CY2016Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	6004000	USD
CY2016Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	6496000	USD
CY2016Q4	us-gaap	Noninterest Income NoninterestIncome	1444000	USD
CY2017Q3	us-gaap	Deferred Tax Liabilities Deferred Expense DeferredTaxLiabilitiesDeferredExpense	1500000	USD
CY2016Q1	us-gaap	Noninterest Income NoninterestIncome	1262000	USD
CY2016Q3	us-gaap	Noninterest Income NoninterestIncome	-2576000	USD
CY2016Q3	us-gaap	Noninterest Income NoninterestIncome	3242000	USD
CY2016Q4	us-gaap	Noninterest Expense NoninterestExpense	5892000	USD
CY2016Q1	us-gaap	Noninterest Expense NoninterestExpense	5232000	USD
CY2016Q3	us-gaap	Noninterest Expense NoninterestExpense	5590000	USD
CY2016Q3	us-gaap	Noninterest Expense NoninterestExpense	5721000	USD
CY2016Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1710000	USD
CY2016Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2024000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-2162000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	4017000	USD
CY2016Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	467000	USD
CY2016Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	389000	USD
CY2016Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-4389000	USD
CY2016Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1211000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	1243000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	1635000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	2227000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	2806000	USD
CY2016Q4	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	43000	USD
CY2016Q1	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	19000	USD
CY2016Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	0	USD
CY2016Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	0	USD
CY2016Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1200000	USD
CY2016Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1616000	USD
CY2016Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2227000	USD
CY2016Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2806000	USD
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.55
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.73
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.01
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.27
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.52
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.70
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.97
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.22
CY2018	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family: "times new roman", serif; font-size: 10pt; margin: 0px 0px 0px 0.5in; text-align: justify;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;"><div style="font-weight:bold;display:inline;">Use of Estimates</div></div></div><div style="font-family: "times new roman", serif; font-size: 10pt; margin: 0px 0px 0px 0.5in; background: none;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); background: none; text-decoration: none; letter-spacing: 0px; top: 0px;;display:inline;"> </div></div><div style="font-family: "times new roman", serif; margin: 0px 0px 0px 0.5in; text-align: justify;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.</div></div><div style="font-family: "times new roman", serif; font-size: 10pt; margin: 0px 0px 0px 0.5in; background: none;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); background: none; text-decoration: none; letter-spacing: 0px; top: 0px;;display:inline;"> </div></div><div style="font-family: "times new roman", serif; font-size: 10pt; margin: 0px 0px 0px 0.5in; text-align: justify;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan losses and the valuation of real estate and other assets acquired in connection with foreclosures or in satisfaction of loans. In connection with the determination of the allowances for loan losses and the valuation of other real estate owned, management obtains independent appraisals for significant properties.</div></div><div style="font-family: "times new roman", serif; font-size: 10pt; margin: 0px 0px 0px 0.5in; text-align: justify; background: none;"><div style="white-space: pre-line; font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); background: none; text-decoration: none; letter-spacing: 0px; top: 0px;;display:inline;"> </div></div><div style="font-family: "times new roman", serif; font-size: 10pt; margin: 0px 0px 0px 0.5in; text-align: justify;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">A substantial portion of the Bank’s loan portfolio consists of single-family residential and commercial real estate loans to customers in the southern Indiana and Louisville, Kentucky metropolitan area. Accordingly, the ultimate collectability of a substantial portion of the Bank’s loan portfolio and the recovery of the carrying amount of other real estate owned are susceptible to changes in local market conditions.</div></div><div style="font-family: "times new roman", serif; font-size: 10pt; margin: 0px 0px 0px 0.5in; text-align: justify; background: none;"><div style="white-space: pre-line; font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); background: none; text-decoration: none; letter-spacing: 0px; top: 0px;;display:inline;"> </div></div><div style="font-family: "times new roman", serif; font-size: 10pt; margin: 0px 0px 0px 0.5in; text-align: justify;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">While management uses available information to recognize losses on loans and other real estate owned, further reductions in the carrying amounts of loans and other real estate owned may be necessary based on changes in local economic conditions. In addition, regulatory agencies, as an integral part of their examination process, periodically review the estimated losses on loans and other real estate owned. Such agencies may require the Company to recognize additional losses based on their judgments about information available to them at the time of their examination. Because of these factors, it is reasonably possible the estimated losses on loans and other real estate owned may change materially in the near term. However, the amount of the change that is reasonably possible cannot be estimated.</div></div><table border="0" style="width:100%; table-layout:fixed;" cellspacing="0" cellpadding="0"><tr><td></td></tr></table>
CY2018	fsfg	Proceeds From Sales Of Other Premises Equipment And Real Estate Development Financed Through Loans ProceedsFromSalesOfOtherPremisesEquipmentAndRealEstateDevelopmentFinancedThroughLoans	0	USD
CY2017	fsfg	Proceeds From Sales Of Other Premises Equipment And Real Estate Development Financed Through Loans ProceedsFromSalesOfOtherPremisesEquipmentAndRealEstateDevelopmentFinancedThroughLoans	0	USD
CY2016	fsfg	Proceeds From Sales Of Other Premises Equipment And Real Estate Development Financed Through Loans ProceedsFromSalesOfOtherPremisesEquipmentAndRealEstateDevelopmentFinancedThroughLoans	8950000	USD
CY2017	fsfg	Business Acquisition Pro Forma Income Loss Attributable To Parent BusinessAcquisitionProFormaIncomeLossAttributableToParent	10142000	USD
CY2018	fsfg	Cumulative Allocated Net Income CumulativeAllocatedNetIncome	1700000	USD
CY2018Q3	us-gaap	Equity Method Investment Ownership Percentage EquityMethodInvestmentOwnershipPercentage	0.51	pure
CY2018	us-gaap	Loans And Leases Receivable Impaired Interest Income Recognized Change In Present Value Attributable To Passage Of Time LoansAndLeasesReceivableImpairedInterestIncomeRecognizedChangeInPresentValueAttributableToPassageOfTime	250000	USD
CY2018	fsfg	Percentage Of Income Tax Realized Upon Settlement PercentageOfIncomeTaxRealizedUponSettlement	0.5	pure
CY2018	us-gaap	Concentration Risk Credit Risk Financial Instrument Maximum Exposure ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure	9600000	USD
CY2017	us-gaap	Concentration Risk Credit Risk Financial Instrument Maximum Exposure ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure	7200000	USD
CY2018	fsfg	Business Acquisition Pro Forma Income Loss Attributable To Parent BusinessAcquisitionProFormaIncomeLossAttributableToParent	11715000	USD
CY2016	fsfg	Business Acquisition Pro Forma Income Loss Attributable To Parent BusinessAcquisitionProFormaIncomeLossAttributableToParent	7472000	USD
CY2018Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	17400000	USD
CY2017Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	12900000	USD
CY2016Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	10300000	USD
CY2018	us-gaap	Trading Securities Realized Gain TradingSecuritiesRealizedGain	43000	USD
CY2017	us-gaap	Trading Securities Realized Gain TradingSecuritiesRealizedGain	229000	USD
CY2016	us-gaap	Trading Securities Realized Gain TradingSecuritiesRealizedGain	795000	USD
CY2018	us-gaap	Trading Securities Unrealized Holding Gain Loss TradingSecuritiesUnrealizedHoldingGainLoss	0	USD
CY2017	us-gaap	Trading Securities Unrealized Holding Gain Loss TradingSecuritiesUnrealizedHoldingGainLoss	-29000	USD
CY2016	us-gaap	Trading Securities Unrealized Holding Gain Loss TradingSecuritiesUnrealizedHoldingGainLoss	-47000	USD
CY2018Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate	25000000	USD
CY2017Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Two To Three Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate	0.0186	pure
CY2017Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate	25000000	USD
CY2018Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Three To Four Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate	0.0187	pure
CY2017	fsfg	Loans And Leases Receivable Related Parties Reclassifications LoansAndLeasesReceivableRelatedPartiesReclassifications	-192000	USD
CY2018	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	119000	USD
CY2017	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	96000	USD
CY2016	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	0	USD
CY2018	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	20000	USD
CY2017	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	66000	USD
CY2016	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	0	USD
CY2018Q3	fsfg	Weighted Average Yield Of Available For Sale Securities In Loss Positions WeightedAverageYieldOfAvailableForSaleSecuritiesInLossPositions	0.0276	pure
CY2018	us-gaap	Impairment Of Investments ImpairmentOfInvestments	95000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	10299000	USD
CY2016Q3	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	10646000	USD
CY2018	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	2521000	USD
CY2017	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	2049000	USD
CY2018	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	4515000	USD
CY2017	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	2204000	USD
CY2018	fsfg	Loans And Leases Receivable Related Parties Reclassifications LoansAndLeasesReceivableRelatedPartiesReclassifications	-74000	USD
CY2018Q3	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	8231000	USD
CY2018Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Of Amounts Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate	0	pure
CY2018Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	0	USD
CY2017Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Of Amounts Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate	0.0104	pure
CY2017Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	10000000	USD
CY2018Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate One To Two Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate	0.0157	pure
CY2018Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From One To Two Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate	15000000	USD
CY2017Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate One To Two Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate	0.0157	pure
CY2017Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From One To Two Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate	15000000	USD
CY2018Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Two To Three Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate	0.0186	pure
CY2018Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Three To Four Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate	10000000	USD
CY2017Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Three To Four Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate	0.0187	pure
CY2017Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Three To Four Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate	10000000	USD
CY2018Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Four To Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate	0.0201	pure
CY2018Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Four To Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate	10000000	USD
CY2017Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Four To Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate	0.0201	pure
CY2017Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Four To Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate	10000000	USD
CY2018Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate After Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterFiveYearsFromBalanceSheetDate	0.0126	pure
CY2018Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due After Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate	30000000	USD
CY2017Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate After Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterFiveYearsFromBalanceSheetDate	0.0126	pure
CY2017Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due After Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate	30000000	USD
CY2018Q3	fsfg	Total Advances In Maturities From Federal Home Loan Banks TotalAdvancesInMaturitiesFromFederalHomeLoanBanks	90000000	USD
CY2017Q3	fsfg	Total Advances In Maturities From Federal Home Loan Banks TotalAdvancesInMaturitiesFromFederalHomeLoanBanks	100000000	USD
CY2018Q3	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Interest Rate FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate	0.0201	pure
CY2018Q3	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2017Q3	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Interest Rate FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate	0.0138	pure
CY2017Q3	us-gaap	Line Of Credit LineOfCredit	18065000	USD
CY2018Q2	us-gaap	Security Owned And Pledged As Collateral Fair Value SecurityOwnedAndPledgedAsCollateralFairValue	2500000	USD
CY2017Q2	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	2200000	USD
CY2018	fsfg	Financial Service Costs FinancialServiceCosts	863000	USD
CY2017	fsfg	Financial Service Costs FinancialServiceCosts	-9000	USD
CY2016	fsfg	Financial Service Costs FinancialServiceCosts	-59000	USD
CY2017Q3	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	0	USD
CY2016Q3	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	0	USD
CY2015Q3	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	0	USD
CY2018	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	177000	USD
CY2017	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	0	USD
CY2016	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	0	USD
CY2018	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsRecoveries	0	USD
CY2017	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsRecoveries	0	USD
CY2016	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsRecoveries	0	USD
CY2018	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Aggregate Write Downs ValuationAllowanceForImpairmentOfRecognizedServicingAssetsAggregateWriteDowns	0	USD
CY2017	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Aggregate Write Downs ValuationAllowanceForImpairmentOfRecognizedServicingAssetsAggregateWriteDowns	0	USD
CY2016	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Aggregate Write Downs ValuationAllowanceForImpairmentOfRecognizedServicingAssetsAggregateWriteDowns	0	USD
CY2018Q3	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	177000	USD
CY2018Q3	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	337000	USD
CY2018Q3	fsfg	Other Assets Period Increase Decrease OtherAssetsPeriodIncreaseDecrease	231000	USD
CY2018Q3	us-gaap	Finite Lived Intangible Assets Period Increase Decrease FiniteLivedIntangibleAssetsPeriodIncreaseDecrease	596000	USD
CY2018Q3	us-gaap	Increase Decrease In Deferred Liabilities IncreaseDecreaseInDeferredLiabilities	28000	USD
CY2018	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	0	USD
CY2017	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	0	USD
CY2016	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	198000	USD
CY2018	fsfg	Estimated Development Costs EstimatedDevelopmentCosts	7600000	USD
CY2016Q3	us-gaap	Proceeds From Sale Of Real Estate ProceedsFromSaleOfRealEstate	10800000	USD
CY2016Q3	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	1900000	USD
CY2018	fsfg	Income Related To Distributions From Historic Tax Credit Entity IncomeRelatedToDistributionsFromHistoricTaxCreditEntity	585000	USD
CY2018Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	21335000	USD
CY2017Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	18803000	USD
CY2018Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	8322000	USD
CY2017Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	7533000	USD
CY2018	fsfg	Lease Expiration Term LeaseExpirationTerm	P10Y
CY2018Q3	us-gaap	Sale Leaseback Transaction Deferred Gain Gross SaleLeasebackTransactionDeferredGainGross	471000	USD
CY2018Q3	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	7500000	USD
CY2016Q3	us-gaap	Real Estate Investments Other RealEstateInvestmentsOther	519000	USD
CY2015Q3	us-gaap	Real Estate Investments Other RealEstateInvestmentsOther	618000	USD
CY2018	us-gaap	Other Real Estate Additions OtherRealEstateAdditions	133000	USD
CY2017	us-gaap	Other Real Estate Additions OtherRealEstateAdditions	703000	USD
CY2016	us-gaap	Other Real Estate Additions OtherRealEstateAdditions	648000	USD
CY2018	us-gaap	Other Real Estate Period Increase Decrease OtherRealEstatePeriodIncreaseDecrease	-63000	USD
CY2017	us-gaap	Other Real Estate Period Increase Decrease OtherRealEstatePeriodIncreaseDecrease	-28000	USD
CY2016	us-gaap	Other Real Estate Period Increase Decrease OtherRealEstatePeriodIncreaseDecrease	-100000	USD
CY2018	us-gaap	Other Real Estate Disposals OtherRealEstateDisposals	827000	USD
CY2017	us-gaap	Other Real Estate Disposals OtherRealEstateDisposals	337000	USD
CY2016	us-gaap	Other Real Estate Disposals OtherRealEstateDisposals	621000	USD
CY2018	us-gaap	Other Real Estate Valuation Adjustments OtherRealEstateValuationAdjustments	-23000	USD
CY2017	us-gaap	Other Real Estate Valuation Adjustments OtherRealEstateValuationAdjustments	-5000	USD
CY2016	us-gaap	Other Real Estate Valuation Adjustments OtherRealEstateValuationAdjustments	-26000	USD
CY2018	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	278000	USD
CY2017	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2016	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2018Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	-3067000	USD
CY2017	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	198000	USD
CY2016	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	150000	USD
CY2018	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	63000	USD
CY2017	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	28000	USD
CY2016	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	100000	USD
CY2016Q3	us-gaap	Goodwill Goodwill	7936000	USD
CY2015Q3	us-gaap	Goodwill Goodwill	7936000	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	1912000	USD
CY2017Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	-2614000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	453000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	344000	USD
CY2016	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	344000	USD
CY2018Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	312000	USD
CY2018Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	214000	USD
CY2018Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	214000	USD
CY2018Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	214000	USD
CY2018Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	214000	USD
CY2018Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	559000	USD
CY2018Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	1727000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	33000	USD
CY2017	us-gaap	Interest Expense Debt InterestExpenseDebt	0	USD
CY2016	us-gaap	Interest Expense Debt InterestExpenseDebt	161000	USD
CY2018Q3	us-gaap	Subordinated Debt SubordinatedDebt	20000000	USD
CY2018Q3	us-gaap	Subordinated Borrowing Interest Rate SubordinatedBorrowingInterestRate	0.0602	pure
CY2012Q3	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	5000000	USD
CY2012Q3	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.040	pure
CY2012Q3	fsfg	Loan Amortization Period LoanAmortizationPeriod	P20Y
CY2012Q3	us-gaap	Line Of Credit Facility Expiration Date1 LineOfCreditFacilityExpirationDate1	2022-07-27
CY2018Q3	us-gaap	Deferred Compensation Arrangement With Individual Recorded Liability DeferredCompensationArrangementWithIndividualRecordedLiability	132000	USD
CY2017Q3	us-gaap	Deferred Compensation Arrangement With Individual Recorded Liability DeferredCompensationArrangementWithIndividualRecordedLiability	80000	USD
CY2018	us-gaap	Deferred Compensation Arrangement With Individual Description DeferredCompensationArrangementWithIndividualDescription	The Company accrues interest on the deferred obligation at an annual rate equal to the prime rate for the immediately preceding calendar quarter plus 2%, but in no event at a rate in excess of 8%
CY2018	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	576000	USD
CY2017	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	493000	USD
CY2016	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	387000	USD
CY2018	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	0	USD
CY2017	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	0	USD
CY2016	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	628000	USD
CY2008Q4	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	203363	shares
CY2018Q3	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	151999	shares
CY2017Q3	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	161115	shares
CY2008Q4	us-gaap	Employee Stock Ownership Plan Esop Weighted Average Purchase Price Of Shares Purchased EmployeeStockOwnershipPlanESOPWeightedAveragePurchasePriceOfSharesPurchased	10.00
CY2018	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	68000	USD
CY2017	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	55000	USD
CY2016	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	0	USD
CY2018	us-gaap	Restricted Stock Expense RestrictedStockExpense	148000	USD
CY2017	us-gaap	Restricted Stock Expense RestrictedStockExpense	121000	USD
CY2016	us-gaap	Restricted Stock Expense RestrictedStockExpense	0	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0175	pure
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0213	pure
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.146	pure
CY2018	fsfg	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Weighted Average Fair Value At Grant Date ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageFairValueAtGrantDate	6.13
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P7Y6M
CY2017Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	197529	shares
CY2017Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	20.15
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	9000	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	63.23
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	55296	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	13.54
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	1200	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	56.56
CY2018Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	150033	shares
CY2018Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	24.88
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y2M12D
CY2018Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	6515000	USD
CY2018Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	150033	shares
CY2018Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	24.88
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P4Y2M12D
CY2018Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue	6515000	USD
CY2018Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	101597	shares
CY2018Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	15.78
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P2Y2M12D
CY2018Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	5334000	USD
CY2018Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	8658	shares
CY2018Q3	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	170261000	USD
CY2018Q3	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	30082000	USD
CY2018Q3	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	20664000	USD
CY2018Q3	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	12047000	USD
CY2018Q3	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	8692000	USD
CY2018Q3	us-gaap	Time Deposits TimeDeposits	241746000	USD
CY2018Q3	fsfg	Federal Deposit Insurance Corporation Insurance Limit FederalDepositInsuranceCorporationInsuranceLimit	250000	USD
CY2018Q3	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	12900000	USD
CY2017Q3	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	11300000	USD
CY2018Q3	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	6900000	USD
CY2017Q3	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	5600000	USD
CY2018	fsfg	Percentage Of Equity Capital PercentageOfEquityCapital	0.25	pure
CY2018	fsfg	Federal Funds Purchased Expiration Date1 FederalFundsPurchasedExpirationDate1	2019-06-30
CY2018Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions	237000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	3453	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1753000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	683000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	109000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	102000	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	76000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	1597000	USD
CY2018	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	567000	USD
CY2017	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	1761000	USD
CY2016	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	-4028000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	3616000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	4023000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1900000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	110000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	234000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	27000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	917000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	1082000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	877000	USD
CY2018	fsfg	Effective Income Tax Rate Reconciliation Bank Owned Life Insurance EffectiveIncomeTaxRateReconciliationBankOwnedLifeInsurance	104000	USD
CY2017	fsfg	Effective Income Tax Rate Reconciliation Bank Owned Life Insurance EffectiveIncomeTaxRateReconciliationBankOwnedLifeInsurance	210000	USD
CY2016	fsfg	Effective Income Tax Rate Reconciliation Bank Owned Life Insurance EffectiveIncomeTaxRateReconciliationBankOwnedLifeInsurance	151000	USD
CY2018	fsfg	Income Tax Reconciliation Other Adjustments Captive Insurance Net Premiums IncomeTaxReconciliationOtherAdjustmentsCaptiveInsuranceNetPremiums	208000	USD
CY2017	fsfg	Income Tax Reconciliation Other Adjustments Captive Insurance Net Premiums IncomeTaxReconciliationOtherAdjustmentsCaptiveInsuranceNetPremiums	275000	USD
CY2016	fsfg	Income Tax Reconciliation Other Adjustments Captive Insurance Net Premiums IncomeTaxReconciliationOtherAdjustmentsCaptiveInsuranceNetPremiums	297000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	0	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	249000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	4660000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-32000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	3000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	139000	USD
CY2018Q3	fsfg	Deferred Tax Asset Liabilities Net DeferredTaxAssetLiabilitiesNet	-664000	USD
CY2017Q3	fsfg	Deferred Tax Asset Liabilities Net DeferredTaxAssetLiabilitiesNet	419000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.245	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.34	pure
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.34	pure
CY2018Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	145000	USD
CY2017Q4	fsfg	Deferred Tax Assets Availablefor Sale Securities Percentage DeferredTaxAssetsAvailableforSaleSecuritiesPercentage	0.21	pure
CY2018	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	4600000	USD
CY2018Q3	us-gaap	Deferred Tax Liabilities Deferred Expense DeferredTaxLiabilitiesDeferredExpense	957000	USD
CY2017	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	4600000	USD
CY2018Q3	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	721000	USD
CY2018Q3	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	567000	USD
CY2018Q3	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	264000	USD
CY2018Q3	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	107000	USD
CY2018Q3	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	107000	USD
CY2018Q3	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	321000	USD
CY2018Q3	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	2087000	USD
CY2018	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	462000	USD
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	278000	USD
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	95000	USD
CY2018Q3	us-gaap	Unused Commitments To Extend Credit UnusedCommitmentsToExtendCredit	126241000	USD
CY2017Q3	us-gaap	Unused Commitments To Extend Credit UnusedCommitmentsToExtendCredit	124126000	USD
CY2018Q3	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	5400000	USD
CY2017Q3	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	5700000	USD
CY2018Q3	invest	Derivative Notional Amount DerivativeNotionalAmount	30384000	USD
CY2018Q3	us-gaap	Derivative Assets DerivativeAssets	421000	USD
CY2018Q3	us-gaap	Derivative Liabilities DerivativeLiabilities	0	USD
CY2018	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	417000	USD
CY2017	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	0	USD
CY2016	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	0	USD
CY2018	us-gaap	Schedule Of Repurchase Agreements ScheduleOfRepurchaseAgreements	<div style="font-family: "times new roman", serif; font-size: 10pt; margin: 0px 0px 0px 0.5in; text-align: justify;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">Repurchase agreements at September 30, 2018 and 2017 are summarized as follows:</div></div><div style="font-family: "times new roman", serif; font-size: 10pt; margin: 0px 0px 0px 0.5in; text-align: justify; background: none;"><div style="white-space: pre-line; font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); background: none; text-decoration: none; letter-spacing: 0px; top: 0px;;display:inline;"> </div></div><div style="text-align:left;"><table style="border: none; border-collapse: collapse; margin-bottom: 0.001pt; margin-left: 0.5in; width: 92%;;text-align:left;"><tr><td style="border-bottom: none; border-top: none; padding: 0px 0px 1pt; vertical-align: bottom; width: 48%;"><div style="font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-bottom: 0px; margin-top: 0px; line-height: normal; background: none; text-align: center;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); background: none; text-decoration: none; letter-spacing: 0px; top: 0px;;display:inline;"> </div></div></td><td style="border-top: none; padding: 0in 0in 1pt; vertical-align: bottom;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td colspan="6" style="border-bottom: 1pt solid rgb(0, 0, 0); border-top: none; padding: 0in; vertical-align: bottom; white-space: nowrap; width: 11%;"><div style="font-family: "times new roman", serif; font-size: 10pt; text-align: center; margin-right: 0px; margin-bottom: 0px; margin-top: 0px; line-height: normal; white-space: nowrap;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;"><div style="white-space: nowrap;;font-weight:bold;display:inline;">2018</div></div></div></td><td style="border-top: none; padding: 0in 0in 0.5pt; vertical-align: bottom; white-space: nowrap;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td style="border-top: none; padding: 0in 0in 1pt; vertical-align: bottom; white-space: nowrap;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td colspan="6" style="border-bottom: 1pt solid rgb(0, 0, 0); border-top: none; padding: 0in; vertical-align: bottom; white-space: nowrap; width: 11%;"><div style="font-family: "times new roman", serif; font-size: 10pt; text-align: center; margin-right: 0px; margin-bottom: 0px; margin-top: 0px; line-height: normal; white-space: nowrap;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;"><div style="white-space: nowrap;;font-weight:bold;display:inline;">2017</div></div></div></td><td style="border-top: none; padding: 0in 0in 0.5pt; vertical-align: bottom; white-space: nowrap;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td></tr><tr><td style="border-bottom: none; border-top: none; padding: 0px; vertical-align: bottom; width: 48%;"><div style="font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-bottom: 0px; margin-top: 0px; line-height: normal; text-align: center;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;"><div style="font-style:italic;display:inline;"><div style="font-weight:bold;display:inline;">(Dollars in thousands)</div></div></div></div></td><td style="padding: 0in; vertical-align: bottom;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td colspan="2" style="border-bottom: none; border-top: 0px none; padding: 0in; vertical-align: bottom; white-space: nowrap; width: 11%;"><div style="font-family: "times new roman", serif; font-size: 10pt; text-align: center; margin-right: 0px; margin-bottom: 0px; margin-top: 0px; line-height: normal; white-space: nowrap;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;"><div style="white-space: nowrap;;font-weight:bold;display:inline;">Weighted</div></div><br></br><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;"><div style="white-space: nowrap;;font-weight:bold;display:inline;">Average</div></div><br></br><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;"><div style="white-space: nowrap;;font-weight:bold;display:inline;">Rate</div></div></div></td><td style="border-top: 0px none; padding: 0in; vertical-align: bottom; white-space: nowrap;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td style="border-top: 0px none; padding: 0in; vertical-align: bottom; white-space: nowrap;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td colspan="2" style="border-bottom: none; border-top: 0px none; padding: 0in; vertical-align: bottom; white-space: nowrap; width: 11%;"><div style="font-family: "times new roman", serif; font-size: 10pt; text-align: center; margin-right: 0px; margin-bottom: 0px; margin-top: 0px; line-height: normal; white-space: nowrap;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;"><div style="white-space: nowrap;;font-weight:bold;display:inline;">Amount</div></div></div></td><td style="padding: 0in; vertical-align: bottom; white-space: nowrap;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td style="padding: 0in; vertical-align: bottom; white-space: nowrap;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td colspan="2" style="border-bottom: none; border-top: 0px none; padding: 0in; vertical-align: bottom; white-space: nowrap; width: 11%;"><div style="font-family: "times new roman", serif; font-size: 10pt; text-align: center; margin-right: 0px; margin-bottom: 0px; margin-top: 0px; line-height: normal; white-space: nowrap;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;"><div style="white-space: nowrap;;font-weight:bold;display:inline;">Weighted</div></div><br></br><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;"><div style="white-space: nowrap;;font-weight:bold;display:inline;">Average</div></div><br></br><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;"><div style="white-space: nowrap;;font-weight:bold;display:inline;">Rate</div></div></div></td><td style="border-top: 0px none; padding: 0in; vertical-align: bottom; white-space: nowrap;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td style="border-top: 0px none; padding: 0in; vertical-align: bottom; white-space: nowrap;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td colspan="2" style="border-bottom: none; border-top: 0px none; padding: 0in; vertical-align: bottom; white-space: nowrap; width: 11%;"><div style="font-family: "times new roman", serif; font-size: 10pt; text-align: center; margin-right: 0px; margin-bottom: 0px; margin-top: 0px; line-height: normal; white-space: nowrap;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;"><div style="white-space: nowrap;;font-weight:bold;display:inline;">Amount</div></div></div></td><td style="padding: 0in; vertical-align: bottom; white-space: nowrap;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td></tr><tr><td style="border-bottom: none; border-top: none; padding: 0px; vertical-align: bottom; width: 48%;"><div style="font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-bottom: 0px; margin-top: 0px; line-height: normal; background: none; text-align: center;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); background: none; text-decoration: none; letter-spacing: 0px; top: 0px;;display:inline;"> </div></div></td><td style="padding: 0in; vertical-align: bottom;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td colspan="2" style="border-bottom: none; border-top: none; padding: 0in; vertical-align: bottom; white-space: nowrap; width: 11%;"><div style="font-family: "times new roman", serif; font-size: 10pt; text-align: center; margin-right: 0px; margin-bottom: 0px; margin-top: 0px; line-height: normal; background: none; white-space: nowrap;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); background: none; text-decoration: none; letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;"> </div></div></td><td style="padding: 0in; vertical-align: bottom; white-space: nowrap;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td style="padding: 0in; vertical-align: bottom; white-space: nowrap;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td colspan="2" style="border-bottom: none; border-top: none; padding: 0in; vertical-align: bottom; white-space: nowrap; width: 11%;"><div style="font-family: "times new roman", serif; font-size: 10pt; text-align: center; margin-right: 0px; margin-bottom: 0px; margin-top: 0px; line-height: normal; background: none; white-space: nowrap;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); background: none; text-decoration: none; letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;"> </div></div></td><td style="padding: 0in; vertical-align: bottom; white-space: nowrap;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td style="padding: 0in; vertical-align: bottom; white-space: nowrap;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td colspan="2" style="border-bottom: none; border-top: none; padding: 0in; vertical-align: bottom; white-space: nowrap; width: 11%;"><div style="font-family: "times new roman", serif; font-size: 10pt; text-align: center; margin-right: 0px; margin-bottom: 0px; margin-top: 0px; line-height: normal; background: none; white-space: nowrap;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); background: none; text-decoration: none; letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;"> </div></div></td><td style="padding: 0in; vertical-align: bottom; white-space: nowrap;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td style="padding: 0in; vertical-align: bottom; white-space: nowrap;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td colspan="2" style="border-bottom: none; border-top: none; padding: 0in; vertical-align: bottom; white-space: nowrap; width: 11%;"><div style="font-family: "times new roman", serif; font-size: 10pt; text-align: center; margin-right: 0px; margin-bottom: 0px; margin-top: 0px; line-height: normal; background: none; white-space: nowrap;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); background: none; text-decoration: none; letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;"> </div></div></td><td style="padding: 0in; vertical-align: bottom; white-space: nowrap;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td></tr><tr><td style="background: rgb(204, 238, 255); border-bottom: none; border-top: none; padding: 0px; vertical-align: bottom; width: 48%;"><div style="font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-bottom: 0px; margin-top: 0px; line-height: normal;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">Retail repurchase agreements</div></div></td><td style="background: rgb(204, 238, 255); border-top: none; padding: 0in; vertical-align: bottom; width: 1%;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td style="background-color: rgb(204, 238, 255); width: 1%; border-bottom: none; border-top: none; text-align: left; vertical-align: bottom; padding: 0in;"><div style="font-size: 10pt; margin-left: 0in; text-indent: 0in; text-align: left; white-space: nowrap;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td style="background: rgb(204, 238, 255); border-bottom: none; border-top: none; padding: 0in; vertical-align: bottom; width: 10%; white-space: nowrap; text-align: right;"><div style="font-family: "times new roman", serif; font-size: 10pt; text-align: right; margin-right: 0in; margin-bottom: 0px; margin-top: 0px; line-height: normal; white-space: nowrap;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;">0.25</div></div></td><td style="background: rgb(204, 238, 255); padding: 0in; vertical-align: bottom; width: 1%; white-space: nowrap; text-align: left;"><div style="font-family: "times new roman", serif; font-size: 10pt; text-align: left; margin: 0px 0px 0px 0in; line-height: normal; white-space: nowrap; text-indent: 0in;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;">%</div></div></td><td style="background-color: rgb(204, 238, 255); width: 1%; vertical-align: bottom; padding: 0in;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td style="background: rgb(204, 238, 255); border-bottom: none; border-top: none; padding: 0in; vertical-align: bottom; width: 1%; white-space: nowrap; text-align: left;"><div style="font-family: "times new roman", serif; font-size: 10pt; text-align: left; margin: 0px 0px 0px 0in; line-height: normal; white-space: nowrap; text-indent: 0in;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;">$</div></div></td><td style="background: rgb(204, 238, 255); border-bottom: none; border-top: none; padding: 0in; vertical-align: bottom; width: 10%; white-space: nowrap; text-align: right;"><div style="font-family: "times new roman", serif; font-size: 10pt; text-align: right; margin-right: 0in; margin-bottom: 0px; margin-top: 0px; line-height: normal; white-space: nowrap;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;">1,352</div></div></td><td style="background: rgb(204, 238, 255); padding: 0in; vertical-align: bottom; width: 1%; white-space: nowrap; text-align: left;"><div style="font-size: 10pt; margin-left: 0in; text-indent: 0in; text-align: left; white-space: nowrap;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td style="background-color: rgb(204, 238, 255); width: 1%; vertical-align: bottom; padding: 0in;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td style="background: rgb(204, 238, 255); border-bottom: none; border-top: none; padding: 0in; vertical-align: bottom; width: 1%; white-space: nowrap; text-align: left;"><div style="font-size: 10pt; margin-left: 0in; text-indent: 0in; text-align: left; white-space: nowrap;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td style="background: rgb(204, 238, 255); border-bottom: none; border-top: none; padding: 0in; vertical-align: bottom; width: 10%; white-space: nowrap; text-align: right;"><div style="font-family: "times new roman", serif; font-size: 10pt; text-align: right; margin-right: 0in; margin-bottom: 0px; margin-top: 0px; line-height: normal; white-space: nowrap;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;">0.25</div></div></td><td style="background: rgb(204, 238, 255); padding: 0in; vertical-align: bottom; width: 1%; white-space: nowrap; text-align: left;"><div style="font-family: "times new roman", serif; font-size: 10pt; text-align: left; margin: 0px 0px 0px 0in; line-height: normal; white-space: nowrap; text-indent: 0in;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;">%</div></div></td><td style="background-color: rgb(204, 238, 255); width: 1%; vertical-align: bottom; padding: 0in;"><div style="font-size: 10pt;"><div style="font-size: 10pt;;display:inline;"> </div></div></td><td style="background: rgb(204, 238, 255); border-bottom: none; border-top: none; padding: 0in; vertical-align: bottom; width: 1%; white-space: nowrap; text-align: left;"><div style="font-family: "times new roman", serif; font-size: 10pt; text-align: left; margin: 0px 0px 0px 0in; line-height: normal; white-space: nowrap; text-indent: 0in;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;">$</div></div></td><td style="background: rgb(204, 238, 255); border-bottom: none; border-top: none; padding: 0in; vertical-align: bottom; width: 10%; white-space: nowrap; text-align: right;"><div style="font-family: "times new roman", serif; font-size: 10pt; text-align: right; margin-right: 0in; margin-bottom: 0px; margin-top: 0px; line-height: normal; white-space: nowrap;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px; white-space: nowrap;;display:inline;">1,348</div></div></td><td style="background: rgb(204, 238, 255); padding: 0in; vertical-align: bottom; width: 1%; white-space: nowrap; text-align: left;"><div style="font-size: 10pt; margin-left: 0in; text-indent: 0in; text-align: left; white-space: nowrap;"><div style="font-size: 10pt;;display:inline;"> </div></div></td></tr></table><div style="clear:both;"></div><div style="clear:both;"></div><div style="clear:both;"></div></div><table border="0" style="width:100%; table-layout:fixed;" cellspacing="0" cellpadding="0"><tr><td></td></tr></table>
CY2018Q3	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	380000	USD
CY2018	fsfg	Charges To Write Down Loan Servicing Rights ChargesToWriteDownLoanServicingRights	177000	USD
CY2017	fsfg	Charges To Write Down Loan Servicing Rights ChargesToWriteDownLoanServicingRights	0	USD
CY2016	fsfg	Charges To Write Down Loan Servicing Rights ChargesToWriteDownLoanServicingRights	0	USD
CY2016	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings	0	USD
CY2018	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	0	USD
CY2017	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	0	USD
CY2016	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	0	USD
CY2017Q3	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	0	USD
CY2016Q3	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	0	USD
CY2015Q3	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	0	USD
CY2018	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings	380000	USD
CY2017	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings	0	USD
CY2016	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	0	USD
CY2011Q3	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	10000000000	USD
CY2018	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-2000	USD
CY2017	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	0	USD
CY2011Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	17120	shares
CY2011Q3	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	1000
CY2011Q3	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	17120000	USD
CY2018	fsfg	Preferred Stock Redemption Percentage PreferredStockRedemptionPercentage	1	pure
CY2018Q3	us-gaap	Other Real Estate Owned Measurement Input OtherRealEstateOwnedMeasurementInput	48.9	pure
CY2015Q3	fsfg	Capital Conservation Bufferpercentage CapitalConservationBufferpercentage	0.000	pure
CY2018Q3	fsfg	Capital Conservation Bufferpercentage CapitalConservationBufferpercentage	0.01875	pure
CY2017Q3	fsfg	Capital Conservation Bufferpercentage CapitalConservationBufferpercentage	0.0125	pure
CY2008Q1	fsfg	Liquidation Account LiquidationAccount	29300000	USD
CY2018Q3	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	9952000	USD
CY2018Q3	fsfg	Residential Mortgage Loans Aggregate Principal Balance ResidentialMortgageLoansAggregatePrincipalBalance	9695000	USD
CY2018	fsfg	Excess Of Fair Value Over Carrying Value ExcessOfFairValueOverCarryingValue	257000	USD
CY2018	us-gaap	Fair Value Measured On Recurring Basis Gain Loss Included In Earnings FairValueMeasuredOnRecurringBasisGainLossIncludedInEarnings	633000	USD
CY2017	us-gaap	Fair Value Measured On Recurring Basis Gain Loss Included In Earnings FairValueMeasuredOnRecurringBasisGainLossIncludedInEarnings	0	USD
CY2016	us-gaap	Fair Value Measured On Recurring Basis Gain Loss Included In Earnings FairValueMeasuredOnRecurringBasisGainLossIncludedInEarnings	0	USD
CY2018Q3	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	167705000	USD
CY2017Q3	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	96283000	USD
CY2018Q3	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	173543000	USD
CY2017Q3	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	182068000	USD
CY2018Q3	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	107124000	USD
CY2017Q3	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	70775000	USD
CY2018Q3	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	120995000	USD
CY2017Q3	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	90360000	USD
CY2018Q3	us-gaap	Deposits Retail DepositsRetail	123007000	USD
CY2017Q3	us-gaap	Deposits Retail DepositsRetail	123010000	USD
CY2018Q3	fsfg	Deposits Brokered DepositsBrokered	118738000	USD
CY2017Q3	fsfg	Deposits Brokered DepositsBrokered	106886000	USD
CY2018Q3	us-gaap	Deposits Deposits	811112000	USD
CY2017Q3	us-gaap	Deposits Deposits	669382000	USD
CY2017Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	2559307	shares
CY2017Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	2242454	shares
CY2017Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	316853	shares
CY2017Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	619000	USD
CY2018	fsfg	Cost Of Real Estate Revenues CostOfRealEstateRevenues	55000	USD
CY2017	fsfg	Cost Of Real Estate Revenues CostOfRealEstateRevenues	57000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	6215000	USD
CY2016	fsfg	Cost Of Real Estate Revenues CostOfRealEstateRevenues	78000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	1763000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	2846000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	371000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	529000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	4199000	USD
CY2018Q3	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	-3000	USD
CY2017	fsfg	Impairment Losses In Non Interest Income ImpairmentLossesInNonInterestIncome	226000	USD
CY2016	fsfg	Impairment Losses In Non Interest Income ImpairmentLossesInNonInterestIncome	4200000	USD
CY2017	fsfg	Historical Tax Credit On Investment HistoricalTaxCreditOnInvestment	249000	USD
CY2016	fsfg	Historical Tax Credit On Investment HistoricalTaxCreditOnInvestment	4700000	USD
CY2018	us-gaap	Income Tax Effects Allocated Directly To Equity Cumulative Effect Of Change In Accounting Principle IncomeTaxEffectsAllocatedDirectlyToEquityCumulativeEffectOfChangeInAccountingPrinciple	0	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-145000	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2018	fsfg	Transfer Of Loans From To Held For Sale To Portfolio Loans TransferOfLoansFromToHeldForSaleToPortfolioLoans	0	USD
CY2017	fsfg	Transfer Of Loans From To Held For Sale To Portfolio Loans TransferOfLoansFromToHeldForSaleToPortfolioLoans	-854000	USD
CY2016	fsfg	Transfer Of Loans From To Held For Sale To Portfolio Loans TransferOfLoansFromToHeldForSaleToPortfolioLoans	1319000	USD
CY2018Q3	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	2857000	USD
CY2017Q3	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	4542000	USD
CY2018Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2193000	USD
CY2017Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	4961000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	55000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	117000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	27000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	7000	USD
CY2018Q3	fsfg	Deferred Tax Assets Valuation Alowance On Foreclosed Real Estate And Repossessed Assets DeferredTaxAssetsValuationAlowanceOnForeclosedRealEstateAndRepossessedAssets	67000	USD
CY2017Q3	fsfg	Deferred Tax Assets Valuation Alowance On Foreclosed Real Estate And Repossessed Assets DeferredTaxAssetsValuationAlowanceOnForeclosedRealEstateAndRepossessedAssets	101000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	105000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	186000	USD
CY2018Q3	fsfg	Deferred Tax Assets Loss On Tax Credit Investment DeferredTaxAssetsLossOnTaxCreditInvestment	1342000	USD
CY2017Q3	fsfg	Deferred Tax Assets Loss On Tax Credit Investment DeferredTaxAssetsLossOnTaxCreditInvestment	1673000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	0	USD
CY2017Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	171000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	158000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	205000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Investment In Subsidiaries DeferredTaxAssetsInvestmentInSubsidiaries	179000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Investment In Subsidiaries DeferredTaxAssetsInvestmentInSubsidiaries	69000	USD
CY2018Q3	fsfg	Deferred Tax Liabilities Unrealized Gain On Securities Available For Sale DeferredTaxLiabilitiesUnrealizedGainOnSecuritiesAvailableForSale	92000	USD
CY2017Q3	fsfg	Deferred Tax Liabilities Unrealized Gain On Securities Available For Sale DeferredTaxLiabilitiesUnrealizedGainOnSecuritiesAvailableForSale	2234000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	132000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	311000	USD
CY2016	us-gaap	Other Than Temporary Impairment Losses Investments Reclassification Adjustment Of Noncredit Portion Included In Net Income Heldtomaturity Securities Before Tax OtherThanTemporaryImpairmentLossesInvestmentsReclassificationAdjustmentOfNoncreditPortionIncludedInNetIncomeHeldtomaturitySecuritiesBeforeTax	0	USD
CY2018Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1342000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1673000	USD
CY2018Q3	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.245	pure
CY2018Q3	fsfg	Deferred Tax Liabilities Accumulated Depreciation DeferredTaxLiabilitiesAccumulatedDepreciation	519000	USD
CY2017Q3	fsfg	Deferred Tax Liabilities Accumulated Depreciation DeferredTaxLiabilitiesAccumulatedDepreciation	811000	USD
CY2018Q3	fsfg	Deferred Tax Liabilities Installment Sale DeferredTaxLiabilitiesInstallmentSale	313000	USD
CY2017Q3	fsfg	Deferred Tax Liabilities Installment Sale DeferredTaxLiabilitiesInstallmentSale	481000	USD
CY2018Q3	fsfg	Deferred Tax Liabilities Acquisition Purchase Accounting Adjustments DeferredTaxLiabilitiesAcquisitionPurchaseAccountingAdjustments	735000	USD
CY2017Q3	fsfg	Deferred Tax Liabilities Acquisition Purchase Accounting Adjustments DeferredTaxLiabilitiesAcquisitionPurchaseAccountingAdjustments	574000	USD
CY2018Q3	fsfg	Deferred Tax Liabilities Federal Home Loan Bank Stock Dividends DeferredTaxLiabilitiesFederalHomeLoanBankStockDividends	84000	USD
CY2017Q3	fsfg	Deferred Tax Liabilities Federal Home Loan Bank Stock Dividends DeferredTaxLiabilitiesFederalHomeLoanBankStockDividends	129000	USD
CY2018Q3	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	0	USD
CY2017Q3	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	2000	USD
CY2018Q3	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	337000	USD
CY2017Q3	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	589000	USD
CY2018Q3	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	113000	USD
CY2017Q3	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	141000	USD
CY2018	us-gaap	Other Than Temporary Impairment Losses Investments Reclassification Adjustment Of Noncredit Portion Included In Net Income Heldtomaturity Securities Before Tax OtherThanTemporaryImpairmentLossesInvestmentsReclassificationAdjustmentOfNoncreditPortionIncludedInNetIncomeHeldtomaturitySecuritiesBeforeTax	95000	USD
CY2017	us-gaap	Other Than Temporary Impairment Losses Investments Reclassification Adjustment Of Noncredit Portion Included In Net Income Heldtomaturity Securities Before Tax OtherThanTemporaryImpairmentLossesInvestmentsReclassificationAdjustmentOfNoncreditPortionIncludedInNetIncomeHeldtomaturitySecuritiesBeforeTax	0	USD
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-09-30
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Entity Registrant Name EntityRegistrantName	First Savings Financial Group Inc
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0001435508
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--09-30
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2018Q1	dei	Entity Public Float EntityPublicFloat	124000000	USD
CY2018	dei	Trading Symbol TradingSymbol	FSFG
CY2018Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	2300810	shares
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018	dei	Entity Small Business EntitySmallBusiness	true

Files In Submission

Name	View Source	Status
0001144204-18-064613-index-headers.html	Edgar Link	pending
0001144204-18-064613-index.html	Edgar Link	pending
0001144204-18-064613.txt	Edgar Link	pending
0001144204-18-064613-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
fsfg-20180930.xml	Edgar Link	completed
fsfg-20180930.xsd	Edgar Link	pending
fsfg-20180930_cal.xml	Edgar Link	unprocessable
fsfg-20180930_def.xml	Edgar Link	unprocessable
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$FSFG
First Savings Financial Group, Inc. Stock $fsfg

2018 Q3 Form 10-K Financial Statement

#000114420418064613 Filed on December 14, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FSFG First Savings Financial Group, Inc. Stock $fsfg

2018 Q3 Form 10-K Financial Statement

#000114420418064613 Filed on December 14, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FSFG
First Savings Financial Group, Inc. Stock $fsfg