$ISTR
Investar Holding Corp Stock $istr

$istr Overview Financials Valuation SEC Filings Company Website

2016 Q4 Form 10-K Financial Statement

#000156459017003868 Filed on March 09, 2017

Income Statement

Concept	2016 Q4	2015 Q4	2015 Q3
Revenue	$11.06M	$9.873M	$9.480M
YoY Change	12.04%	11.91%	15.86%
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	$380.0K	$370.0K	$360.0K
YoY Change	2.7%	-5.13%	16.13%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$2.281M	$1.646M	$1.528M
YoY Change	38.58%	32.21%	29.27%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$2.699M	$2.199M	$2.706M
YoY Change	22.74%	44.96%	26.39%
Income Tax	$851.0K	$745.0K	$850.0K
% Of Pretax Income	31.53%	33.88%	31.41%
Net Earnings	$1.848M	$1.454M	$1.856M
YoY Change	27.1%	-27.59%	28.71%
Net Earnings / Revenue	16.71%	14.73%	19.58%
Basic Earnings Per Share	$0.26	$0.20	$0.26
Diluted Earnings Per Share	$0.26	$0.20	$0.26
COMMON SHARES
Basic Shares Outstanding	7.115M		7.217M
Diluted Shares Outstanding			7.253M

Balance Sheet

Concept	2016 Q4	2015 Q4	2015 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$29.34M	$20.79M	$19.65M
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	$31.72M	$30.63M	$29.90M
YoY Change	3.57%	7.33%	7.36%
Goodwill
YoY Change
Intangibles	$100.0K
YoY Change
Long-Term Investments
YoY Change
Other Assets	$2.900M	$1.900M	$1.800M
YoY Change	52.63%	72.73%	63.64%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$1.159B	$1.032B	$937.7M
YoY Change	12.35%	17.07%	19.51%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$40.10M	$39.10M	$34.60M
YoY Change	2.56%	217.89%	185.95%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$11.90M	$14.60M	$13.00M
YoY Change	-18.49%	135.48%	91.18%
LONG-TERM LIABILITIES
Long-Term Debt	$3.600M	$3.600M	$3.600M
YoY Change	0.0%	0.0%	0.0%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$3.600M	$3.600M	$3.600M
YoY Change	0.0%	0.0%	0.0%
TOTAL LIABILITIES
Total Short-Term Liabilities	$11.90M	$14.60M	$13.00M
Total Long-Term Liabilities	$3.600M	$3.600M	$3.600M
Total Liabilities	$1.046B	$922.2M	$829.6M
YoY Change	13.45%	18.85%	21.57%
SHAREHOLDERS EQUITY
Retained Earnings	$26.23M	$18.65M
YoY Change	40.63%	57.93%
Common Stock	$88.60M	$91.36M
YoY Change	-3.02%	-0.12%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$112.8M	$109.4M	$108.1M
YoY Change
Total Liabilities & Shareholders Equity	$1.159B	$1.032B	$937.7M
YoY Change	12.35%	17.31%	19.51%

Cashflow Statement

Concept	2016 Q4	2015 Q4	2015 Q3
OPERATING ACTIVITIES
Net Income	$1.848M	$1.454M	$1.856M
YoY Change	27.1%	-27.59%	28.71%
Depreciation, Depletion And Amortization	$380.0K	$370.0K	$360.0K
YoY Change	2.7%	-5.13%	16.13%
Cash From Operating Activities	$4.240M	-$24.64M	$25.98M
YoY Change	-117.21%	-48.66%	-250.96%
INVESTING ACTIVITIES
Capital Expenditures	-$280.0K	-$1.650M	-$830.0K
YoY Change	-83.03%	60.19%	66.0%
Acquisitions
YoY Change
Other Investing Activities	-$31.22M	-$63.61M	-$42.12M
YoY Change	-50.92%	44.86%	42.01%
Cash From Investing Activities	-$31.51M	-$65.25M	-$42.95M
YoY Change	-51.71%	45.19%	42.41%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	10.55M	90.98M	12.31M
YoY Change	-88.4%	-2.39%	-76.08%
NET CHANGE
Cash From Operating Activities	4.240M	-24.64M	25.98M
Cash From Investing Activities	-31.51M	-65.25M	-42.95M
Cash From Financing Activities	10.55M	90.98M	12.31M
Net Change In Cash	-16.72M	1.090M	-4.660M
YoY Change	-1633.94%	289.29%	-213.94%
FREE CASH FLOW
Cash From Operating Activities	$4.240M	-$24.64M	$25.98M
Capital Expenditures	-$280.0K	-$1.650M	-$830.0K
Free Cash Flow	$4.520M	-$22.99M	$26.81M
YoY Change	-119.66%	-51.04%	-260.44%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2016	dei	Document Type DocumentType	10-K
CY2016	dei	Amendment Flag AmendmentFlag	false
CY2016	dei	Document Period End Date DocumentPeriodEndDate	2016-12-31
CY2016	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2016
CY2016	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2016	dei	Trading Symbol TradingSymbol	ISTR
CY2016	dei	Entity Registrant Name EntityRegistrantName	INVESTAR HOLDING CORP
CY2016	dei	Entity Central Index Key EntityCentralIndexKey	0001602658
CY2016	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2014	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	305000
CY2016	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	443000
CY2015	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	489000
CY2016	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2016	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2016	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2016	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2016Q2	dei	Entity Public Float EntityPublicFloat	99218702
CY2017Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	7168235
CY2015Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	6313000
CY2015Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	14472000
CY2015Q4	us-gaap	Federal Funds Sold FederalFundsSold	181000
CY2015Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	26408000
CY2015Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	20966000
CY2015Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	113371000
CY2016Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	7201000
CY2015Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	3512000
CY2016Q4	us-gaap	Other Assets OtherAssets	2325000
CY2015Q4	us-gaap	Other Assets OtherAssets	2365000
CY2016Q4	us-gaap	Assets Assets	1158960000
CY2015Q4	us-gaap	Assets Assets	1031555000
CY2016Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	108404000
CY2015Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	90447000
CY2016Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	799383000
CY2015Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	646959000
CY2016Q4	us-gaap	Deposits Deposits	907787000
CY2015Q4	us-gaap	Deposits Deposits	737406000
CY2016Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	82803000
CY2015Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	127497000
CY2016Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	39087000
CY2015Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	39099000
CY2016Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	3609000
CY2015Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	3609000
CY2016Q4	us-gaap	Other Borrowings OtherBorrowings	1000000
CY2015Q4	us-gaap	Accrued Liabilities Current And Noncurrent AccruedLiabilitiesCurrentAndNoncurrent	14594000
CY2015Q4	us-gaap	Liabilities Liabilities	922205000
CY2016Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2015Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	7102000
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CY2015Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	18650000
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CY2015Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1031555000
CY2015Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	113828000
CY2015Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	26271000
CY2015Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	6128000
CY2015Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	5368000
CY2015Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0
CY2015Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000
CY2015Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1.00
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CY2014	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	340000
CY2016	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	1266000
CY2015	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	15000
CY2014	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	3000
CY2016	istr	Gain Losses On Sales Of Foreclosed Assets GainLossesOnSalesOfForeclosedAssets	13000
CY2015	istr	Gain Losses On Sales Of Foreclosed Assets GainLossesOnSalesOfForeclosedAssets	-105000
CY2016	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	405000
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CY2016	istr	Servicing Fees And Fee Income On Serviced Loans ServicingFeesAndFeeIncomeOnServicedLoans	2087000
CY2015	istr	Servicing Fees And Fee Income On Serviced Loans ServicingFeesAndFeeIncomeOnServicedLoans	2543000
CY2014	istr	Servicing Fees And Fee Income On Serviced Loans ServicingFeesAndFeeIncomeOnServicedLoans	885000
CY2016	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	911000
CY2015	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	654000
CY2014	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	648000
CY2016	us-gaap	Noninterest Income NoninterestIncome	5468000
CY2015	us-gaap	Noninterest Income NoninterestIncome	8344000
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CY2016	istr	Income Loss From Continuing Operations Before Noninterest Expense Income Taxes Extraordinary Items Noncontrolling Interests IncomeLossFromContinuingOperationsBeforeNoninterestExpenseIncomeTaxesExtraordinaryItemsNoncontrollingInterests	38128000
CY2015	istr	Income Loss From Continuing Operations Before Noninterest Expense Income Taxes Extraordinary Items Noncontrolling Interests IncomeLossFromContinuingOperationsBeforeNoninterestExpenseIncomeTaxesExtraordinaryItemsNoncontrollingInterests	37937000
CY2014	istr	Income Loss From Continuing Operations Before Noninterest Expense Income Taxes Extraordinary Items Noncontrolling Interests IncomeLossFromContinuingOperationsBeforeNoninterestExpenseIncomeTaxesExtraordinaryItemsNoncontrollingInterests	30926000
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CY2016	us-gaap	Occupancy Net OccupancyNet	995000
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CY2014	us-gaap	Occupancy Net OccupancyNet	833000
CY2016	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1488000
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CY2015	us-gaap	Marketing Expense MarketingExpense	248000
CY2014	us-gaap	Marketing Expense MarketingExpense	329000
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CY2015	us-gaap	Professional Fees ProfessionalFees	1075000
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CY2016	istr	Investment Tax Credit Impairment Cost InvestmentTaxCreditImpairmentCost	11000
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CY2014	istr	Investment Tax Credit Impairment Cost InvestmentTaxCreditImpairmentCost	690000
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CY2014	us-gaap	Noninterest Expense NoninterestExpense	24384000
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	11489000
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CY2015	istr	Other Comprehensive Income Loss Amortization Of Unrealized Gains Losses On Security Transferred From Available For Sale Securities To Held To Maturity Net Of Tax OtherComprehensiveIncomeLossAmortizationOfUnrealizedGainsLossesOnSecurityTransferredFromAvailableForSaleSecuritiesToHeldToMaturityNetOfTax	-5000
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CY2014	istr	Other Comprehensive Income Loss Amortization Of Unrealized Gains Losses On Security Transferred From Available For Sale Securities To Held To Maturity Net Of Tax OtherComprehensiveIncomeLossAmortizationOfUnrealizedGainsLossesOnSecurityTransferredFromAvailableForSaleSecuritiesToHeldToMaturityNetOfTax	-3000
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CY2015	istr	Other Comprehensive Tax Expense Benefit Of Unrealized Holding Gain Loss Related To Securities Transferred From Available For Sale To Held To Maturity OtherComprehensiveTaxExpenseBenefitOfUnrealizedHoldingGainLossRelatedToSecuritiesTransferredFromAvailableForSaleToHeldToMaturity	2000
CY2014	istr	Other Comprehensive Tax Expense Benefit Of Unrealized Holding Gain Loss Related To Securities Transferred From Available For Sale To Held To Maturity OtherComprehensiveTaxExpenseBenefitOfUnrealizedHoldingGainLossRelatedToSecuritiesTransferredFromAvailableForSaleToHeldToMaturity	1000
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CY2016	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts
CY2014	istr	Amortization Of Purchase Accounting Adjustments AmortizationOfPurchaseAccountingAdjustments	-366000
CY2015	us-gaap	Real Estate Owned Valuation Allowance Provision1 RealEstateOwnedValuationAllowanceProvision1	54000
CY2014	us-gaap	Real Estate Owned Valuation Allowance Provision1 RealEstateOwnedValuationAllowanceProvision1	210000
CY2016	istr	Federal Home Loan Bank Stock Dividends FederalHomeLoanBankStockDividends	66000
CY2015	istr	Federal Home Loan Bank Stock Dividends FederalHomeLoanBankStockDividends	14000
CY2014	istr	Federal Home Loan Bank Stock Dividends FederalHomeLoanBankStockDividends	8000
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	609000
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	385000
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-207000
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-386000
CY2014	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-134000
CY2016	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	189000
CY2015	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	12000
CY2015	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-23000
CY2016	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	494000
CY2015	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	349684000
CY2016	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	29013000
CY2014	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	600000
CY2016	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	-2164000
CY2015	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	8086000
CY2014	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	3615000
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	37304000
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	37516000
CY2014	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	-87598000
CY2016	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	15515000
CY2015	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	27187000
CY2016	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	87340000
CY2014	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	10465000
CY2015	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	5622000
CY2016	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	6217000
CY2015	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	1663000
CY2014	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	385000
CY2016	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	2800000
CY2015	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	6813000
CY2014	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	1972000
CY2016	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	2261000
CY2015	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	7067000
CY2014	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	5509000
CY2014	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	105241000
CY2016	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	100634000
CY2015	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	124041000
CY2014	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	223132000
CY2016	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	541000
CY2015	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	2857000
CY2014	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	1506000
CY2016	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	2686000
CY2015	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	696000
CY2014	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	3000
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3964000
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4079000
CY2014	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5142000
CY2016	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	100000
CY2016	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	3500000
CY2016	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	553000
CY2014	us-gaap	Payments To Acquire Limited Partnership Interests PaymentsToAcquireLimitedPartnershipInterests	766000
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-151966000
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-173314000
CY2016	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	170436000
CY2015	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	109391000
CY2016	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-12000
CY2015	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	26807000
CY2016	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-33780000
CY2015	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	13141000
CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	5000000
CY2015	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	221000
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3473000
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	572000
CY2016	istr	Proceeds From Stock Options And Warrants Exercised ProceedsFromStockOptionsAndWarrantsExercised	165000
CY2015	istr	Proceeds From Stock Options And Warrants Exercised ProceedsFromStockOptionsAndWarrantsExercised	135000
CY2014	istr	Proceeds From Stock Options And Warrants Exercised ProceedsFromStockOptionsAndWarrantsExercised	297000
CY2016	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	1000000
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	123144000
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	8482000
CY2014Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	19512000
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	2850000
CY2016	us-gaap	Interest Paid InterestPaid	8294000
CY2016	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	3875000
CY2016	us-gaap	Use Of Estimates UseOfEstimates	<div> <p style="text-align:justify;margin-bottom:0pt;margin-top:18pt;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Use of Estimates </p> <p style="text-align:justify;margin-bottom:0pt;margin-top:6pt;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">The preparation of statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates, and such differences could be material. </p> <p style="text-align:justify;margin-bottom:0pt;margin-top:12pt;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan losses. While management uses available information to recognize losses on loans, future additions to the allowance 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 Company’s allowance for loan losses. Such agencies may require the Company to recognize additions to the allowance based on their judgments about information available to them at the time of their examination. Because of these factors, it is reasonably possible that the allowance for loan losses may change materially in the near term. However, the amount of the change that is reasonably possible cannot be estimated. </p> <p style="text-align:justify;margin-bottom:0pt;margin-top:12pt;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Other estimates that are susceptible to significant change in the near term relate to the determination of other-than-temporary impairments of securities and the fair value of financial instruments. </p></div>
CY2016	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div> <p style="text-align:justify;margin-bottom:0pt;margin-top:18pt;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Reclassifications </p> <p style="text-align:justify;margin-bottom:0pt;margin-top:6pt;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Certain reclassifications have been made to the 2015 and 2014 financial statements to be consistent with the 2016 presentation. </p></div>
CY2016Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	685000
CY2016	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1
CY2016	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0
CY2016	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	400000
CY2015	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	200000
CY2014	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	300000
CY2016Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	376000
CY2016Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	3583000
CY2015Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	279000
CY2015Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	736000
CY2016Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	10000
CY2016Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	489000
CY2015Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	23000
CY2015Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	160000
CY2016Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	222
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	3268000
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	9647000
CY2015Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	62334000
CY2015Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	666000
CY2015Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	3950000
CY2015Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	70000
CY2015Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	66284000
CY2015Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	736000
CY2016Q4	us-gaap	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	11
CY2016Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	489000
CY2016Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	14274000
CY2016Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	489000
CY2015Q4	us-gaap	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	10
CY2015Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	13289000
CY2015Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	78000
CY2015Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	17186000
CY2015Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	160000
CY2016Q4	istr	Available For Sale Securities Debt Maturities Within One Year Fully Taxable Equivalent Yield AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFullyTaxableEquivalentYield	0.0161
CY2016Q4	istr	Available For Sale Securities Debt Maturities After One Through Five Years Fully Taxable Equivalent Yield AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFullyTaxableEquivalentYield	0.0227
CY2016Q4	istr	Available For Sale Securities Debt Maturities After Five Through Ten Years Fully Taxable Equivalent Yield AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFullyTaxableEquivalentYield	0.0277
CY2016Q4	istr	Available For Sale Securities Debt Maturities After Ten Years Fully Taxable Equivalent Yield AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFullyTaxableEquivalentYield	0.0251
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	1753000
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	10509000
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	27173000
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	126112000
CY2016Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	165547000
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	1750000
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	10476000
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	26771000
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	123348000
CY2016Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	162345000
CY2016Q4	istr	Held To Maturity Securities Debt Maturities Within One Year Fully Taxable Equivalent Yield HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFullyTaxableEquivalentYield	0.0717
CY2016Q4	istr	Held To Maturity Securities Debt Maturities After One Through Five Years Fully Taxable Equivalent Yield HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFullyTaxableEquivalentYield	0.0717
CY2016Q4	istr	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fully Taxable Equivalent Yield HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFullyTaxableEquivalentYield	0.0717
CY2016Q4	istr	Held To Maturity Securities Debt Maturities After Ten Years Fully Taxable Equivalent Yield HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFullyTaxableEquivalentYield	0.0352
CY2016Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	3095000
CY2016Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	2745000
CY2015	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	4257000
CY2015	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	204000
CY2016Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	13566000
CY2016Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	686000
CY2016Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	3089000
CY2016Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	2637000
CY2016Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	13200000
CY2015Q4	istr	Available For Sale Securities Debt Maturities After One Through Five Years Fully Taxable Equivalent Yield AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFullyTaxableEquivalentYield	0.0201
CY2015Q4	istr	Available For Sale Securities Debt Maturities After Five Through Ten Years Fully Taxable Equivalent Yield AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFullyTaxableEquivalentYield	0.0281
CY2015Q4	istr	Available For Sale Securities Debt Maturities After Ten Years Fully Taxable Equivalent Yield AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFullyTaxableEquivalentYield	0.0263
CY2015Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	9979000
CY2015Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	23662000
CY2015Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	79003000
CY2015Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	112644000
CY2015Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	9984000
CY2015Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	23494000
CY2015Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	78801000
CY2015Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	112279000
CY2015Q4	istr	Held To Maturity Securities Debt Maturities Within One Year Fully Taxable Equivalent Yield HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFullyTaxableEquivalentYield	0.0717
CY2015Q4	istr	Held To Maturity Securities Debt Maturities After One Through Five Years Fully Taxable Equivalent Yield HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFullyTaxableEquivalentYield	0.0717
CY2015Q4	istr	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fully Taxable Equivalent Yield HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFullyTaxableEquivalentYield	0.0717
CY2015Q4	istr	Held To Maturity Securities Debt Maturities After Ten Years Fully Taxable Equivalent Yield HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFullyTaxableEquivalentYield	0.0317
CY2015Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	655000
CY2015Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	2950000
CY2015Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	3575000
CY2015Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	19228000
CY2015Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	657000
CY2015Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	2958000
CY2015Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	3584000
CY2015Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	19072000
CY2016Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	893426000
CY2015Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	745441000
CY2016Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	1978000
CY2016Q4	istr	Financing Receivable Recorded Investment Past Due And Nonaccrual Status FinancingReceivableRecordedInvestmentPastDueAndNonaccrualStatus	3011000
CY2016Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	890415000
CY2016Q4	istr	Loan Participations And Whole Loans Sold To And Serviced For Others Not On Balance Sheet LoanParticipationsAndWholeLoansSoldToAndServicedForOthersNotOnBalanceSheet	274900000
CY2015Q4	istr	Loan Participations And Whole Loans Sold To And Serviced For Others Not On Balance Sheet LoanParticipationsAndWholeLoansSoldToAndServicedForOthersNotOnBalanceSheet	383700000
CY2016Q4	istr	Loan Participations And Whole Loans Sold To And Serviced For Others Unpaid Principal Balance LoanParticipationsAndWholeLoansSoldToAndServicedForOthersUnpaidPrincipalBalance	319600000
CY2015Q4	istr	Loan Participations And Whole Loans Sold To And Serviced For Others Unpaid Principal Balance LoanParticipationsAndWholeLoansSoldToAndServicedForOthersUnpaidPrincipalBalance	426900000
CY2016Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	19957000
CY2015Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	17992000
CY2014Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	14631000
CY2016	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	5058000
CY2015	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	6600000
CY2016	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	3093000
CY2015	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	3239000
CY2014Q4	us-gaap	Notes Receivable Net NotesReceivableNet	2778000
CY2015	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	140000
CY2015	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications To From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference	110000
CY2015	istr	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Payments Received CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesPaymentsReceived	232000
CY2015	istr	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Charges Offs CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesChargesOffs	61000
CY2015	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Disposals Of Loans CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans	45000
CY2015Q4	us-gaap	Notes Receivable Net NotesReceivableNet	2690000
CY2016	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	121000
CY2016	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications To From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference	1000
CY2016	istr	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Payments Received CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesPaymentsReceived	551000
CY2016	istr	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Charges Offs CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesChargesOffs	85000
CY2016Q4	us-gaap	Notes Receivable Net NotesReceivableNet	2176000
CY2015Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	741396000
CY2014Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	425000
CY2015Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	395000
CY2014Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	4630000
CY2013Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	3380000
CY2016	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2079000
CY2015	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1865000
CY2014	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1628000
CY2016	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	1228000
CY2015	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	630000
CY2014	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	459000
CY2016	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	72000
CY2015	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	263000
CY2014	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	81000
CY2016Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	423000
CY2016Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	6628000
CY2015Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	4045000
CY2014Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	70000
CY2014Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	4560000
CY2014Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	3568000
CY2014Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	619222000
CY2014Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	622790000
CY2016Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	3094000
CY2016Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	3167000
CY2016	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	6584000
CY2016	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	174000
CY2016Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	1283000
CY2016Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	1303000
CY2016Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	423000
CY2016	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	650000
CY2016	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	6000
CY2016Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	4377000
CY2016Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	4470000
CY2016	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	7234000
CY2016	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	180000
CY2015Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	3450000
CY2015Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	3445000
CY2015	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	4047000
CY2015	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	189000
CY2015Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	595000
CY2015Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	595000
CY2015Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	220000
CY2015	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	210000
CY2015	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	15000
CY2015Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	4045000
CY2015Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	4040000
CY2014Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	3568000
CY2014Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	3386000
CY2016	istr	Other Real Estate Owned Write Downs OtherRealEstateOwnedWriteDowns	7000
CY2014Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	3566000
CY2014	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	3782000
CY2014	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	110000
CY2016	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	20
CY2015	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	11
CY2016Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	2399000
CY2015Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	2175000
CY2016	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	436000
CY2016	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	436000
CY2015	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	1639000
CY2015	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	1639000
CY2016	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0
CY2015	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0
CY2014Q4	us-gaap	Foreclosed Assets ForeclosedAssets	2735000
CY2016	istr	Other Real Estate Owned Transfers From Non Acquired Loans OtherRealEstateOwnedTransfersFromNonAcquiredLoans	3795000
CY2015	istr	Other Real Estate Owned Transfers From Non Acquired Loans OtherRealEstateOwnedTransfersFromNonAcquiredLoans	950000
CY2016	istr	Other Real Estate Owned Transfers From Acquired Loans OtherRealEstateOwnedTransfersFromAcquiredLoans	80000
CY2015	istr	Other Real Estate Owned Transfers From Acquired Loans OtherRealEstateOwnedTransfersFromAcquiredLoans	55000
CY2016	istr	Other Real Estate Owned Other Real Estate Sold OtherRealEstateOwnedOtherRealEstateSold	528000
CY2015	istr	Other Real Estate Owned Other Real Estate Sold OtherRealEstateOwnedOtherRealEstateSold	2961000
CY2015	istr	Other Real Estate Owned Write Downs OtherRealEstateOwnedWriteDowns	54000
CY2016Q4	us-gaap	Indefinite Lived Trademarks IndefiniteLivedTrademarks	100000
CY2016Q4	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0
CY2016Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	617000
CY2015Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	617000
CY2016Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	167000
CY2015Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	126000
CY2016Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	450000
CY2015Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	491000
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	41000
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	41000
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	41000
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	41000
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	41000
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	41000
CY2016Q4	us-gaap	Interest Bearing Domestic Deposit Negotiable Order Of Withdrawal Now InterestBearingDomesticDepositNegotiableOrderOfWithdrawalNOW	171556000
CY2015Q4	us-gaap	Interest Bearing Domestic Deposit Negotiable Order Of Withdrawal Now InterestBearingDomesticDepositNegotiableOrderOfWithdrawalNOW	140503000
CY2016Q4	us-gaap	Interest Bearing Domestic Deposit Money Market InterestBearingDomesticDepositMoneyMarket	123079000
CY2015Q4	us-gaap	Interest Bearing Domestic Deposit Money Market InterestBearingDomesticDepositMoneyMarket	96113000
CY2016Q4	us-gaap	Interest Bearing Domestic Deposit Savings InterestBearingDomesticDepositSavings	52860000
CY2015Q4	us-gaap	Interest Bearing Domestic Deposit Savings InterestBearingDomesticDepositSavings	53735000
CY2016Q4	us-gaap	Interest Bearing Domestic Deposit Time Deposits InterestBearingDomesticDepositTimeDeposits	451888000
CY2015Q4	us-gaap	Interest Bearing Domestic Deposit Time Deposits InterestBearingDomesticDepositTimeDeposits	356608000
CY2016Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	268875000
CY2015Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	321804000
CY2016Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	183013000
CY2015Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	34804000
CY2016Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	267003000
CY2016Q4	istr	Time Deposits100000 To249999 TimeDeposits100000To249999	134920000
CY2016Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	131697000
CY2016Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	35006000
CY2016Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	10004000
CY2016Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	8178000
CY2014	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	-200000
CY2016	us-gaap	Derivative Instruments Gain Loss Reclassification From Accumulated Oci To Income Estimated Net Amount To Be Transferred DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred	8000
CY2016Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2015Q4	istr	Time Deposits100000 To249999 TimeDeposits100000To249999	13395000
CY2016Q4	istr	Time Deposits250000 And Above TimeDeposits250000AndAbove	48093000
CY2015Q4	istr	Time Deposits250000 And Above TimeDeposits250000AndAbove	21409000
CY2016Q4	us-gaap	Time Deposits TimeDeposits	451888000
CY2015Q4	us-gaap	Time Deposits TimeDeposits	356608000
CY2016Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Or Less ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsOrLess	59739000
CY2015Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Or Less ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsOrLess	4675000
CY2016Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Through Six Months ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsThroughSixMonths	26053000
CY2015Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Through Six Months ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsThroughSixMonths	10039000
CY2016Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Six Months Through12 Months ContractualMaturitiesTimeDeposits100000OrMoreSixMonthsThrough12Months	20987000
CY2015Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Six Months Through12 Months ContractualMaturitiesTimeDeposits100000OrMoreSixMonthsThrough12Months	12912000
CY2016Q4	istr	Contractual Maturities Time Deposits100000 Or More One Year Through Three Years ContractualMaturitiesTimeDeposits100000OrMoreOneYearThroughThreeYears	67253000
CY2015Q4	istr	Contractual Maturities Time Deposits100000 Or More One Year Through Three Years ContractualMaturitiesTimeDeposits100000OrMoreOneYearThroughThreeYears	5710000
CY2016Q4	istr	Contractual Maturities Time Deposits100000 Or More After Three Years ContractualMaturitiesTimeDeposits100000OrMoreAfterThreeYears	8981000
CY2015Q4	istr	Contractual Maturities Time Deposits100000 Or More After Three Years ContractualMaturitiesTimeDeposits100000OrMoreAfterThreeYears	1468000
CY2016Q4	istr	Deposits Public Funds Amount DepositsPublicFundsAmount	29800000
CY2015Q4	istr	Deposits Public Funds Amount DepositsPublicFundsAmount	17500000
CY2016Q4	us-gaap	Security Owned And Pledged As Collateral Fair Value SecurityOwnedAndPledgedAsCollateralFairValue	28100000
CY2015Q4	us-gaap	Security Owned And Pledged As Collateral Fair Value SecurityOwnedAndPledgedAsCollateralFairValue	16900000
CY2016Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	29400000
CY2015Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	28100000
CY2016Q4	us-gaap	Securities Sold Under Agreements To Repurchase Fair Value Of Collateral SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral	49300000
CY2015Q4	us-gaap	Securities Sold Under Agreements To Repurchase Fair Value Of Collateral SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral	41900000
CY2016Q4	us-gaap	Assets Sold Under Agreements To Repurchase Interest Rate AssetsSoldUnderAgreementsToRepurchaseInterestRate	0.0020
CY2015Q4	us-gaap	Assets Sold Under Agreements To Repurchase Interest Rate AssetsSoldUnderAgreementsToRepurchaseInterestRate	0.0020
CY2015Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	119137000
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From One To Two Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate	73603000
CY2015Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From One To Two Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate	4160000
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate	6100000
CY2015Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate	1100000
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Three To Four Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate	3100000
CY2015Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Three To Four Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate	3100000
CY2015Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Of Amounts Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate	0.0040
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate One To Two Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate	0.0079
CY2015Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate One To Two Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate	0.0097
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Two To Three Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate	0.0091
CY2015Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Two To Three Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate	0.0100
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Three To Four Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate	0.0152
CY2015Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Three To Four Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate	0.0152
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Interest Rate FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate	0.0082
CY2015Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Interest Rate FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate	0.0045
CY2016Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Amount Of Available Unused Funds FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds	344100000
CY2016	us-gaap	Maximum Length Of Time Hedged In Interest Rate Cash Flow Hedge1 MaximumLengthOfTimeHedgedInInterestRateCashFlowHedge1	P3Y7M6D
CY2016Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	50000000
CY2016	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	400000
CY2015	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	-200000
CY2015Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	11531000
CY2015	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	200000
CY2014	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	100000
CY2013Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	3945114
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	22811
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	216000
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	238811
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	64333
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	14667
CY2015	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	10125
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	278352
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	46512
CY2016	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	5500
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	319364
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	88049
CY2016	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	14.28
CY2016	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	14.00
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	14.36
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	14.16
CY2014	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P8Y11M16D
CY2015	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P8Y5M1D
CY2016	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P7Y8M1D
CY2016	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P6Y9M18D
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	1400000
CY2016Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	400000
CY2016Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	700000
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0022
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0017
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.1955
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.1848
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0162
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0179
CY2016	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P7Y
CY2015	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P7Y
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	3.44
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	3.75
CY2016	istr	Minimum Service Period For Participation In Defined Benefit Plan MinimumServicePeriodForParticipationInDefinedBenefitPlan	P90D
CY2016	istr	Defined Contribution Plan Employers Discretionary Contribution Annual Vesting Percentage DefinedContributionPlanEmployersDiscretionaryContributionAnnualVestingPercentage	0.20
CY2016	istr	Defined Contribution Plan Employer Discretionary Contribution Amount Award Vesting Period DefinedContributionPlanEmployerDiscretionaryContributionAmountAwardVestingPeriod	P5Y
CY2016	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0
CY2016	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	400000
CY2015	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	400000
CY2014	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	400000
CY2016Q4	istr	Deferred Compensation Arrangement With Individual Monthly Distribution DeferredCompensationArrangementWithIndividualMonthlyDistribution	2000
CY2016	istr	Deferred Compensation Arrangement Maximum Contractual Term DeferredCompensationArrangementMaximumContractualTerm	2020
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	3816000
CY2015	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	3897000
CY2014	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1279000
CY2014	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.34
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	3921000
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	3704000
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2014	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	2224000
CY2016	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	273000
CY2015Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	1200000
CY2016	istr	Tax Credit Carryforward Expiration Year TaxCreditCarryforwardExpirationYear	2033
CY2015	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	11531000
CY2016	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss	-1711000
CY2016	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	9065000
CY2016	istr	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Paydowns FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPaydowns	120000
CY2016	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	485000
CY2016Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	18280000
CY2016Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	0
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	2150000
CY2015	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	142000
CY2014	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	118000
CY2015	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	62000
CY2014	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	1002000
CY2015	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	11000
CY2014	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	41000
CY2015	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.332
CY2014	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.175
CY2015Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1402000
CY2014Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1435000
CY2015Q4	istr	Deferred Tax Liabilities Federal Home Loan Bank Stock Dividend DeferredTaxLiabilitiesFederalHomeLoanBankStockDividend	5000
CY2014Q4	istr	Deferred Tax Liabilities Federal Home Loan Bank Stock Dividend DeferredTaxLiabilitiesFederalHomeLoanBankStockDividend	16000
CY2016Q4	istr	Deferred Tax Liabilities Basis Difference In Acquired Assets And Liabilities DeferredTaxLiabilitiesBasisDifferenceInAcquiredAssetsAndLiabilities	276000
CY2015Q4	istr	Deferred Tax Liabilities Basis Difference In Acquired Assets And Liabilities DeferredTaxLiabilitiesBasisDifferenceInAcquiredAssetsAndLiabilities	26000
CY2014Q4	istr	Deferred Tax Liabilities Unrealized Gains Losses On Available For Sale Securities DeferredTaxLiabilitiesUnrealizedGainsLossesOnAvailableForSaleSecurities	62000
CY2016Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1946000
CY2015Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1433000
CY2014Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1513000
CY2015Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	1588000
CY2014Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	879000
CY2016Q4	istr	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Other Real Estate Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForOtherRealEstateLosses	266000
CY2015Q4	istr	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Other Real Estate Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForOtherRealEstateLosses	328000
CY2014Q4	istr	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Other Real Estate Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForOtherRealEstateLosses	517000
CY2016Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	1115000
CY2015Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	357000
CY2016Q4	istr	Deferred Tax Assets Unamortized Start Up Cost DeferredTaxAssetsUnamortizedStartUpCost	123000
CY2015Q4	istr	Deferred Tax Assets Unamortized Start Up Cost DeferredTaxAssetsUnamortizedStartUpCost	147000
CY2014Q4	istr	Deferred Tax Assets Unamortized Start Up Cost DeferredTaxAssetsUnamortizedStartUpCost	165000
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	299000
CY2015Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	412000
CY2014Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	617000
CY2016Q4	istr	Deferred Tax Assets Deferred Gain On Sale Of Other Real Estate DeferredTaxAssetsDeferredGainOnSaleOfOtherRealEstate	33000
CY2015Q4	istr	Deferred Tax Assets Deferred Gain On Sale Of Other Real Estate DeferredTaxAssetsDeferredGainOnSaleOfOtherRealEstate	35000
CY2014Q4	istr	Deferred Tax Assets Basis Difference In Acquired Assets And Liabilities DeferredTaxAssetsBasisDifferenceInAcquiredAssetsAndLiabilities	46000
CY2016Q4	istr	Deferred Tax Assets Historical Tax Credit DeferredTaxAssetsHistoricalTaxCredit	243000
CY2015Q4	istr	Deferred Tax Assets Historical Tax Credit DeferredTaxAssetsHistoricalTaxCredit	247000
CY2014Q4	istr	Deferred Tax Assets Historical Tax Credit DeferredTaxAssetsHistoricalTaxCredit	226000
CY2016Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	585000
CY2015Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	234000
CY2014Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	160000
CY2016Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	4814000
CY2015Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	3348000
CY2014Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	2610000
CY2014Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1097000
CY2016Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	900000
CY2015Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	8360000
CY2015Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	581000
CY2016Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.080
CY2016Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.060
CY2016Q4	istr	Common Equity Tier One Capital Ratio Required For Capital Adequacy CommonEquityTierOneCapitalRatioRequiredForCapitalAdequacy	0.045
CY2016Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.040
CY2016Q4	us-gaap	Unused Commitments To Extend Credit UnusedCommitmentsToExtendCredit	143900000
CY2015Q4	us-gaap	Unused Commitments To Extend Credit UnusedCommitmentsToExtendCredit	149900000
CY2016Q4	istr	Commitment To Fund Investment In Sbic Qualified Funds CommitmentToFundInvestmentInSBICQualifiedFunds	900000
CY2016Q4	istr	Average Reserve Balance Maintained With Federal Reserve Bank AverageReserveBalanceMaintainedWithFederalReserveBank	14500000
CY2015Q4	istr	Average Reserve Balance Maintained With Federal Reserve Bank AverageReserveBalanceMaintainedWithFederalReserveBank	12700000
CY2016Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8406000
CY2016Q1	us-gaap	Noninterest Income NoninterestIncome	1287000
CY2016Q2	us-gaap	Noninterest Income NoninterestIncome	2256000
CY2016Q3	us-gaap	Noninterest Income NoninterestIncome	1029000
CY2016Q4	us-gaap	Noninterest Income NoninterestIncome	896000
CY2015Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	0
CY2014Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	0
CY2015	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	0
CY2016Q4	us-gaap	Liabilities Fair Value Disclosure Nonrecurring LiabilitiesFairValueDisclosureNonrecurring	0
CY2015Q4	us-gaap	Liabilities Fair Value Disclosure Nonrecurring LiabilitiesFairValueDisclosureNonrecurring	0
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	29342000
CY2016Q4	us-gaap	Investments Investments	183142000
CY2016Q4	us-gaap	Derivative Assets DerivativeAssets	8000
CY2016Q4	istr	Federal Home Loan Bank Advances Short Term And Repurchase Agreements FederalHomeLoanBankAdvancesShortTermAndRepurchaseAgreements	112690000
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	9200000
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	20785000
CY2015Q4	us-gaap	Investments Investments	139779000
CY2015Q4	istr	Federal Home Loan Bank Advances Short Term And Repurchase Agreements FederalHomeLoanBankAdvancesShortTermAndRepurchaseAgreements	158236000
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7107187
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7214045
CY2014	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5533514
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	7149834
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	7258008
CY2014	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	5777302
CY2016Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10378000
CY2016Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10719000
CY2016Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10993000
CY2016Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	11062000
CY2016Q1	us-gaap	Interest Expense InterestExpense	1831000
CY2016Q2	us-gaap	Interest Expense InterestExpense	2061000
CY2016Q3	us-gaap	Interest Expense InterestExpense	2240000
CY2016Q4	us-gaap	Interest Expense InterestExpense	2281000
CY2016Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8547000
CY2016Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8658000
CY2016Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8753000
CY2016Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8781000
CY2016Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	454000
CY2016Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	800000
CY2016Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	450000
CY2016Q4	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	375000
CY2016Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8093000
CY2016Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	7858000
CY2016Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8303000
CY2015Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2199000
CY2015Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	965000
CY2015Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	951000
CY2015Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	850000
CY2015Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	745000
CY2016Q4	us-gaap	Noninterest Expense NoninterestExpense	6603000
CY2015Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9873000
CY2015Q1	us-gaap	Interest Expense InterestExpense	1301000
CY2015Q2	us-gaap	Interest Expense InterestExpense	1407000
CY2016Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2996000
CY2016Q1	us-gaap	Noninterest Expense NoninterestExpense	6384000
CY2016Q2	us-gaap	Noninterest Expense NoninterestExpense	7104000
CY2016Q3	us-gaap	Noninterest Expense NoninterestExpense	6548000
CY2016Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	3010000
CY2016Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2784000
CY2016Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2699000
CY2016Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1006000
CY2016Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1005000
CY2016Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	747000
CY2016Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	851000
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	1990000
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	2005000
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	2037000
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	1848000
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2016Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.29
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.26
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.29
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.26
CY2015Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	8800000
CY2015Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9187000
CY2015Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9480000
CY2015Q3	us-gaap	Interest Expense InterestExpense	1528000
CY2015Q4	us-gaap	Interest Expense InterestExpense	1646000
CY2015Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	7499000
CY2015Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	7780000
CY2015Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	7952000
CY2015Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8227000
CY2015Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	700000
CY2015Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	400000
CY2015Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	400000
CY2015Q4	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	365000
CY2015Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	6799000
CY2015Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	7380000
CY2015Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	7552000
CY2015Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	7862000
CY2015Q1	us-gaap	Noninterest Income NoninterestIncome	2540000
CY2015Q2	us-gaap	Noninterest Income NoninterestIncome	2066000
CY2015Q3	us-gaap	Noninterest Income NoninterestIncome	2167000
CY2015Q4	us-gaap	Noninterest Income NoninterestIncome	1571000
CY2015Q1	us-gaap	Noninterest Expense NoninterestExpense	6424000
CY2015Q2	us-gaap	Noninterest Expense NoninterestExpense	6682000
CY2015Q3	us-gaap	Noninterest Expense NoninterestExpense	7013000
CY2015Q4	us-gaap	Noninterest Expense NoninterestExpense	7234000
CY2015Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2915000
CY2015Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2764000
CY2015Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2706000
CY2015Q1	us-gaap	Net Income Loss NetIncomeLoss	1950000
CY2015Q2	us-gaap	Net Income Loss NetIncomeLoss	1813000
CY2015Q3	us-gaap	Net Income Loss NetIncomeLoss	1856000
CY2015Q4	us-gaap	Net Income Loss NetIncomeLoss	1454000
CY2015Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.27
CY2015Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.25
CY2015Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.26
CY2015Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
CY2015Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.27
CY2015Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.25
CY2015Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.26
CY2015Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20

Files In Submission

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0001564590-17-003868-index-headers.html	Edgar Link	pending
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0001564590-17-003868.txt	Edgar Link	pending
0001564590-17-003868-xbrl.zip	Edgar Link	pending
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$ISTR
Investar Holding Corp Stock $istr

2016 Q4 Form 10-K Financial Statement

#000156459017003868 Filed on March 09, 2017

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ISTR Investar Holding Corp Stock $istr

2016 Q4 Form 10-K Financial Statement

#000156459017003868 Filed on March 09, 2017

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ISTR
Investar Holding Corp Stock $istr