$ISTR
Investar Holding Corp Stock $istr

$istr Overview Financials Valuation SEC Filings Company Website

2014 Q4 Form 10-K Financial Statement

#000156459015002171 Filed on March 31, 2015

Income Statement

Concept	2014 Q4	2014	2013 Q4
Revenue	$8.822M	$31.37M	$6.605M
YoY Change	33.57%	39.59%
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	$390.0K	$1.330M	$270.0K
YoY Change	44.44%	49.44%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$1.245M	$4.675M	$1.002M
YoY Change	24.25%	35.12%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$1.517M	$6.542M	$268.0K
YoY Change	466.04%	51.58%
Income Tax	-$491.0K	$1.145M	$90.00K
% Of Pretax Income	-32.37%	17.5%	33.58%
Net Earnings	$2.008M	$5.397M	$178.0K
YoY Change	1028.09%	70.36%
Net Earnings / Revenue	22.76%	17.2%	2.69%
Basic Earnings Per Share	$0.28	$0.98	$0.05
Diluted Earnings Per Share	$0.27	$0.93	$0.04
COMMON SHARES
Basic Shares Outstanding	7.254M	5.534M
Diluted Shares Outstanding		5.777M

Balance Sheet

Concept	2014 Q4	2014	2013 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$19.01M		$27.70M
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	$28.54M	$28.50M	$24.68M
YoY Change	15.63%	15.38%
Goodwill	$2.684M		$2.684M
YoY Change	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$1.100M	$1.100M	$1.200M
YoY Change	-8.33%	-8.33%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$881.2M	$879.4M	$634.9M
YoY Change	38.78%	38.51%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable			$300.0K
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$12.30M	$12.30M	$10.20M
YoY Change	20.59%	20.59%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$6.200M	$6.200M	$2.200M
YoY Change	181.82%	181.82%
LONG-TERM LIABILITIES
Long-Term Debt	$3.600M	$3.600M	$3.600M
YoY Change	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%
TOTAL LIABILITIES
Total Short-Term Liabilities	$6.200M	$6.200M	$2.200M
Total Long-Term Liabilities	$3.600M	$3.600M	$3.600M
Total Liabilities	$776.0M	$776.0M	$579.5M
YoY Change	33.91%	33.91%
SHAREHOLDERS EQUITY
Retained Earnings	$11.81M		$6.609M
YoY Change	78.68%
Common Stock	$91.48M		$49.22M
YoY Change	85.84%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$23.00K
YoY Change
Treasury Stock Shares
Shareholders Equity	$103.4M	$103.4M	$55.48M
YoY Change
Total Liabilities & Shareholders Equity	$879.4M	$879.4M	$634.9M
YoY Change	38.49%	38.51%

Cashflow Statement

Concept	2014 Q4	2014	2013 Q4
OPERATING ACTIVITIES
Net Income	$2.008M	$5.397M	$178.0K
YoY Change	1028.09%	70.36%
Depreciation, Depletion And Amortization	$390.0K	$1.330M	$270.0K
YoY Change	44.44%	49.44%
Cash From Operating Activities	-$47.99M	-$87.60M	$1.600M
YoY Change	-3099.38%	-650.25%
INVESTING ACTIVITIES
Capital Expenditures	-$1.030M	$5.142M	-$3.910M
YoY Change	-73.66%	-154.76%
Acquisitions
YoY Change
Other Investing Activities	-$43.91M	-$150.5M	-$54.56M
YoY Change	-19.52%	6.02%
Cash From Investing Activities	-$44.94M	-$155.6M	-$58.47M
YoY Change	-23.14%	2.83%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$6.000K
YoY Change		-99.89%
Debt Paid & Issued, Net		$3.171M
YoY Change		-58.04%
Cash From Financing Activities	93.21M	234.5M	71.14M
YoY Change	31.02%	47.53%
NET CHANGE
Cash From Operating Activities	-47.99M	-87.60M	1.600M
Cash From Investing Activities	-44.94M	-155.6M	-58.47M
Cash From Financing Activities	93.21M	234.5M	71.14M
Net Change In Cash	280.0K	-8.690M	14.27M
YoY Change	-98.04%	-136.88%
FREE CASH FLOW
Cash From Operating Activities	-$47.99M	-$87.60M	$1.600M
Capital Expenditures	-$1.030M	$5.142M	-$3.910M
Free Cash Flow	-$46.96M	-$92.74M	$5.510M
YoY Change	-952.27%	-466.42%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2013	us-gaap	Interest Expense Deposits InterestExpenseDeposits	3204000
CY2012	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	181000
CY2013	us-gaap	Interest Income Other InterestIncomeOther	30000
CY2014	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	31369000
CY2014	us-gaap	Interest Income Other InterestIncomeOther	51000
CY2012	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	14587000
CY2012	us-gaap	Interest Expense Deposits InterestExpenseDeposits	2361000
CY2012	us-gaap	Interest Expense InterestExpense	2542000
CY2014	us-gaap	Interest Expense Deposits InterestExpenseDeposits	4273000
CY2014Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	7262085
CY2013	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	256000
CY2013	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	21686000
CY2013	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	22472000
CY2014Q4	us-gaap	Goodwill Goodwill	2684000
CY2013Q4	us-gaap	Goodwill Goodwill	2684000
CY2013Q4	us-gaap	Other Assets OtherAssets	2308000
CY2014Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	284000
CY2014	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2014	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2014Q4	us-gaap	Loans Receivable Held For Sale Net LoansReceivableHeldForSaleNet	103396000
CY2013Q4	us-gaap	Loans Receivable Held For Sale Net LoansReceivableHeldForSaleNet	5029000
CY2014Q4	istr	Federal Home Loan Bank Stock And First National Bankers Bank Stock FederalHomeLoanBankStockAndFirstNationalBankersBankStock	5566000
CY2013Q4	istr	Federal Home Loan Bank Stock And First National Bankers Bank Stock FederalHomeLoanBankStockAndFirstNationalBankersBankStock	2020000
CY2013Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	285000
CY2014Q4	us-gaap	Accrued Liabilities Current And Noncurrent AccruedLiabilitiesCurrentAndNoncurrent	5881000
CY2014Q4	us-gaap	Liabilities Liabilities	775970000
CY2014Q4	us-gaap	Common Stock Value CommonStockValue	7264000
CY2013Q4	us-gaap	Common Stock Value CommonStockValue	3943000
CY2014Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	69838000
CY2013Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	56733000
CY2014Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	22301000
CY2014Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1.00
CY2014Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	40000000
CY2014Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	7262085
CY2012	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	278000
CY2014	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	402000
CY2014	us-gaap	Interest Expense InterestExpense	4675000
CY2013	us-gaap	Interest Expense InterestExpense	3460000
CY2014	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2014
CY2014	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2014	dei	Trading Symbol TradingSymbol	ISTR
CY2014	dei	Document Type DocumentType	10-K
CY2014	dei	Amendment Flag AmendmentFlag	false
CY2014	dei	Document Period End Date DocumentPeriodEndDate	2014-12-31
CY2014	dei	Entity Registrant Name EntityRegistrantName	INVESTAR HOLDING CORP
CY2014	dei	Entity Central Index Key EntityCentralIndexKey	0001602658
CY2014	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2013Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	21739000
CY2014	us-gaap	Noninterest Expense NoninterestExpense	24384000
CY2013	us-gaap	Noninterest Expense NoninterestExpense	19024000
CY2013	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1148000
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	979000
CY2012	us-gaap	Net Income Loss NetIncomeLoss	2361000
CY2014Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	84213000
CY2014Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	121000
CY2014Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	11809000
CY2014Q4	us-gaap	Assets Assets	879354000
CY2014Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	70217000
CY2014Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	557901000
CY2014Q4	us-gaap	Deposits Deposits	628118000
CY2014Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	125785000
CY2014Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	12293000
CY2014Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	3609000
CY2014Q4	us-gaap	Treasury Stock Value TreasuryStockValue	23000
CY2014Q4	us-gaap	Other Assets OtherAssets	2413000
CY2013Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	45281000
CY2013Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	6609000
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-350000
CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	55483000
CY2013Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	634946000
CY2013Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	5986000
CY2013Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	3380000
CY2013Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	2679000
CY2014Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	618160000
CY2013Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	500715000
CY2013Q4	us-gaap	Liabilities Liabilities	579463000
CY2013Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	56173000
CY2013Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	6579000
CY2013Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1205000
CY2013Q4	us-gaap	Accrued Liabilities Current And Noncurrent AccruedLiabilitiesCurrentAndNoncurrent	1942000
CY2014Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	879354000
CY2014Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	4630000
CY2014Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	3964000
CY2014Q4	us-gaap	Stockholders Equity StockholdersEquity	103384000
CY2012	us-gaap	Interest Income Other InterestIncomeOther	34000
CY2012	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	685000
CY2012	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	11360000
CY2014	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2014	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
CY2014Q3	dei	Entity Public Float EntityPublicFloat	40796250
CY2015Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	7268344
CY2014Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	5519000
CY2013Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	5964000
CY2014Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	13493000
CY2014Q4	us-gaap	Federal Funds Sold FederalFundsSold	500000
CY2013Q4	us-gaap	Federal Funds Sold FederalFundsSold	500000
CY2014Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	19512000
CY2013Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	28203000
CY2014Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	70299000
CY2014Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	22519000
CY2014Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	28538000
CY2013Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	24680000
CY2014Q4	us-gaap	Foreclosed Assets ForeclosedAssets	2735000
CY2013Q4	us-gaap	Foreclosed Assets ForeclosedAssets	3515000
CY2014Q4	us-gaap	Interest Receivable InterestReceivable	2435000
CY2013Q4	us-gaap	Interest Receivable InterestReceivable	1835000
CY2014Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1097000
CY2013Q4	us-gaap	Assets Assets	634946000
CY2013Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	72795000
CY2013Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	459811000
CY2013Q4	us-gaap	Deposits Deposits	532606000
CY2013Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	30818000
CY2013Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	10203000
CY2013Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	3609000
CY2012	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	12045000
CY2012	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	118000
CY2012	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	34000
CY2013	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	906000
CY2013Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1.00
CY2013Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	40000000
CY2013Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	3945114
CY2013Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	3945114
CY2012	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	13968000
CY2014	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	4266000
CY2014	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-1087000
CY2014	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	71000
CY2014	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	16348000
CY2014	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	29979000
CY2014	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	945000
CY2013	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	402000
CY2014	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	394000
CY2013	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	354000
CY2012	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	307000
CY2014	us-gaap	Other Noninterest Expense OtherNoninterestExpense	2634000
CY2013	us-gaap	Other Noninterest Expense OtherNoninterestExpense	2213000
CY2012	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1146000
CY2014	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	95648000
CY2014	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	2089000
CY2014	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	6000
CY2014	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	194000
CY2014	us-gaap	Proceeds From Issuance Initial Public Offering ProceedsFromIssuanceInitialPublicOffering	41728000
CY2014	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	234530000
CY2013	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	158971000
CY2014	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-8691000
CY2013	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	23562000
CY2012Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	4641000
CY2014	us-gaap	Income Taxes Paid IncomeTaxesPaid	1336000
CY2013	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	596000
CY2012	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	201000
CY2014	us-gaap	Noninterest Income NoninterestIncome	5860000
CY2013	us-gaap	Noninterest Income NoninterestIncome	5354000
CY2012	us-gaap	Noninterest Income NoninterestIncome	3625000
CY2014	us-gaap	Interest Paid InterestPaid	4675000
CY2013	us-gaap	Interest Paid InterestPaid	3301000
CY2014	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	706000
CY2013	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	1287000
CY2012	us-gaap	Noninterest Expense NoninterestExpense	11645000
CY2014	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	26694000
CY2013	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	19012000
CY2014	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1628000
CY2013	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1026000
CY2014	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	25066000
CY2014	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	1204000
CY2013	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	17986000
CY2014	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	305000
CY2013	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	214000
CY2014	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	340000
CY2013	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	449000
CY2012	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	139000
CY2014	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	230000
CY2013	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	97000
CY2012	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	2000
CY2014	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	1659000
CY2013	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	247000
CY2014	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	3000
CY2013	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	2000
CY2014	us-gaap	Interest And Fee Income Loans Held For Sale Mortgages InterestAndFeeIncomeLoansHeldForSaleMortgages	2119000
CY2013	us-gaap	Interest And Fee Income Loans Held For Sale Mortgages InterestAndFeeIncomeLoansHeldForSaleMortgages	2843000
CY2012	us-gaap	Interest And Fee Income Loans Held For Sale Mortgages InterestAndFeeIncomeLoansHeldForSaleMortgages	3131000
CY2014	istr	Income Loss From Continuing Operations Before Noninterest Expense Income Taxes Extraordinary Items Noncontrolling Interests Net IncomeLossFromContinuingOperationsBeforeNoninterestExpenseIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet	30926000
CY2013	istr	Income Loss From Continuing Operations Before Noninterest Expense Income Taxes Extraordinary Items Noncontrolling Interests Net IncomeLossFromContinuingOperationsBeforeNoninterestExpenseIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet	23340000
CY2012	istr	Income Loss From Continuing Operations Before Noninterest Expense Income Taxes Extraordinary Items Noncontrolling Interests Net IncomeLossFromContinuingOperationsBeforeNoninterestExpenseIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet	14985000
CY2014	us-gaap	Labor And Related Expense LaborAndRelatedExpense	14565000
CY2013	us-gaap	Labor And Related Expense LaborAndRelatedExpense	11772000
CY2012	us-gaap	Labor And Related Expense LaborAndRelatedExpense	7461000
CY2014	us-gaap	Occupancy Net OccupancyNet	2428000
CY2013	us-gaap	Occupancy Net OccupancyNet	1899000
CY2012	us-gaap	Occupancy Net OccupancyNet	1127000
CY2014	us-gaap	Taxes Other TaxesOther	299000
CY2013	us-gaap	Taxes Other TaxesOther	280000
CY2012	us-gaap	Taxes Other TaxesOther	170000
CY2014	istr	Federal Deposit Insurance Corporation And Office Of Financial Institutions Assessments Expense FederalDepositInsuranceCorporationAndOfficeOfFinancialInstitutionsAssessmentsExpense	531000
CY2013	istr	Federal Deposit Insurance Corporation And Office Of Financial Institutions Assessments Expense FederalDepositInsuranceCorporationAndOfficeOfFinancialInstitutionsAssessmentsExpense	344000
CY2012	istr	Federal Deposit Insurance Corporation And Office Of Financial Institutions Assessments Expense FederalDepositInsuranceCorporationAndOfficeOfFinancialInstitutionsAssessmentsExpense	207000
CY2014	us-gaap	Legal Fees LegalFees	125000
CY2013	us-gaap	Legal Fees LegalFees	126000
CY2012	us-gaap	Legal Fees LegalFees	128000
CY2014	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1289000
CY2013	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	847000
CY2012	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	530000
CY2014	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	330000
CY2013	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	320000
CY2012	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	212000
CY2014	us-gaap	Supplies Expense SuppliesExpense	167000
CY2013	us-gaap	Supplies Expense SuppliesExpense	226000
CY2012	us-gaap	Supplies Expense SuppliesExpense	119000
CY2014	istr	Software Amortization And Expense SoftwareAmortizationAndExpense	537000
CY2013	istr	Software Amortization And Expense SoftwareAmortizationAndExpense	406000
CY2012	istr	Software Amortization And Expense SoftwareAmortizationAndExpense	286000
CY2014	us-gaap	Professional Fees ProfessionalFees	475000
CY2013	us-gaap	Professional Fees ProfessionalFees	355000
CY2012	us-gaap	Professional Fees ProfessionalFees	128000
CY2014	us-gaap	Communication Communication	179000
CY2013	us-gaap	Communication Communication	150000
CY2012	us-gaap	Communication Communication	74000
CY2013	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	323000
CY2014	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	-87598000
CY2014Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	6192000
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	43553000
CY2014	us-gaap	Travel And Entertainment Expense TravelAndEntertainmentExpense	135000
CY2013	us-gaap	Travel And Entertainment Expense TravelAndEntertainmentExpense	86000
CY2012	us-gaap	Travel And Entertainment Expense TravelAndEntertainmentExpense	57000
CY2014	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	690000
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	6542000
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	4316000
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	3340000
CY2014	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1145000
CY2014	us-gaap	Net Income Loss NetIncomeLoss	5397000
CY2013	us-gaap	Net Income Loss NetIncomeLoss	3168000
CY2014	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.98
CY2013	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.86
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.79
CY2014	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.93
CY2013	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.81
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.71
CY2014	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.04
CY2013	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.05
CY2012	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.05
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	224000
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	296000
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	92000
CY2014	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	898000
CY2013	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-739000
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	449000
CY2014	us-gaap	Other Comprehensive Income Loss Transfers From Held To Maturity To Available For Sale Securities Net Of Tax OtherComprehensiveIncomeLossTransfersFromHeldToMaturityToAvailableForSaleSecuritiesNetOfTax	-3000
CY2013	us-gaap	Other Comprehensive Income Loss Transfers From Held To Maturity To Available For Sale Securities Net Of Tax OtherComprehensiveIncomeLossTransfersFromHeldToMaturityToAvailableForSaleSecuritiesNetOfTax	20000
CY2014	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-200000
CY2014	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	471000
CY2013	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1015000
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	357000
CY2014	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	5868000
CY2013	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2153000
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2718000
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	116000
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	153000
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	47000
CY2014	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	463000
CY2013	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-381000
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	232000
CY2014	us-gaap	Other Comprehensive Income Reclassification Adjustment For Held To Maturity Transferred To Available For Sale Securities Tax OtherComprehensiveIncomeReclassificationAdjustmentForHeldToMaturityTransferredToAvailableForSaleSecuritiesTax	-1000
CY2013	us-gaap	Other Comprehensive Income Reclassification Adjustment For Held To Maturity Transferred To Available For Sale Securities Tax OtherComprehensiveIncomeReclassificationAdjustmentForHeldToMaturityTransferredToAvailableForSaleSecuritiesTax	10000
CY2012	us-gaap	Other Comprehensive Income Reclassification Adjustment For Held To Maturity Transferred To Available For Sale Securities Tax OtherComprehensiveIncomeReclassificationAdjustmentForHeldToMaturityTransferredToAvailableForSaleSecuritiesTax	0
CY2014	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	-103000
CY2013	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	0
CY2012	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	0
CY2012Q1	us-gaap	Stockholders Equity StockholdersEquity	35166000
CY2012	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	5758000
CY2012	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	16000
CY2012	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	141000
CY2012	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	68000
CY2013	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	5339000
CY2013	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	4490000
CY2013	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	23000
CY2013	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	179000
CY2013	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	150000
CY2014	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	41728000
CY2014	istr	Stock Issued During Period Value Stock Warrants Exercised StockIssuedDuringPeriodValueStockWarrantsExercised	297000
CY2014Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	6178000
CY2013Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	37000
CY2013Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	3343000
CY2014	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	17000
CY2014	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	6000
CY2014	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	197000
CY2014	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	228000
CY2012	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	113813000
CY2014	istr	Federal Home Loan Bank Stock Dividends FederalHomeLoanBankStockDividends	8000
CY2013	istr	Federal Home Loan Bank Stock Dividends FederalHomeLoanBankStockDividends	4000
CY2012	istr	Federal Home Loan Bank Stock Dividends FederalHomeLoanBankStockDividends	2000
CY2014	us-gaap	Share Based Compensation ShareBasedCompensation	228000
CY2013	us-gaap	Share Based Compensation ShareBasedCompensation	150000
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	68000
CY2014	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	600000
CY2014	us-gaap	Adjustment For Amortization AdjustmentForAmortization	-325000
CY2013	us-gaap	Adjustment For Amortization AdjustmentForAmortization	-626000
CY2012	us-gaap	Adjustment For Amortization AdjustmentForAmortization	-345000
CY2014	istr	Real Estate Owned Write Downs RealEstateOwnedWriteDowns	210000
CY2013	istr	Real Estate Owned Write Downs RealEstateOwnedWriteDowns	121000
CY2012	istr	Real Estate Owned Write Downs RealEstateOwnedWriteDowns	26000
CY2014	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1285000
CY2013	us-gaap	Depreciation And Amortization DepreciationAndAmortization	862000
CY2012	us-gaap	Depreciation And Amortization DepreciationAndAmortization	587000
CY2013	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-833000
CY2012	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-575000
CY2014	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	238471000
CY2013	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	88210000
CY2012	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	114963000
CY2014	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	142222000
CY2013	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	103013000
CY2013	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	365000
CY2012	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	366000
CY2013	istr	Increase Decrease In Prepaid Office Of Financial Institutions Or Federal Deposit Insurance Corporation Assessment IncreaseDecreaseInPrepaidOfficeOfFinancialInstitutionsOrFederalDepositInsuranceCorporationAssessment	-212000
CY2012	istr	Increase Decrease In Prepaid Office Of Financial Institutions Or Federal Deposit Insurance Corporation Assessment IncreaseDecreaseInPrepaidOfficeOfFinancialInstitutionsOrFederalDepositInsuranceCorporationAssessment	-140000
CY2014	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	134000
CY2013	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-773000
CY2012	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-21000
CY2013	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	772000
CY2012	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	406000
CY2014	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-1000
CY2013	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-38000
CY2012	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	4000
CY2014	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	3616000
CY2012	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	14000
CY2013	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	15922000
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	-1094000
CY2014	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	31603000
CY2013	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	16626000
CY2012	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	6736000
CY2014	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	55901000
CY2013	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	40384000
CY2012	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	26816000
CY2014	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	10465000
CY2013	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	8530000
CY2012	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	4789000
CY2014	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	385000
CY2013	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	170000
CY2014	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	105241000
CY2013	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	59333000
CY2012	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	5214000
CY2014	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	1972000
CY2013	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	828000
CY2012	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	238000
CY2014	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	5509000
CY2013	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	1312000
CY2012	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	935000
CY2014	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	223132000
CY2013	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	197974000
CY2012	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	78883000
CY2014	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	1506000
CY2013	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	1642000
CY2012	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	329000
CY2014	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	3000
CY2013	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	1306000
CY2012	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	135000
CY2013	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	5339000
CY2012	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	5758000
CY2014	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	297000
CY2012	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	505000
CY2014	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	5142000
CY2013	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	9389000
CY2012	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	4916000
CY2013	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	9293000
CY2014	us-gaap	Payments To Acquire Limited Partnership Interests PaymentsToAcquireLimitedPartnershipInterests	766000
CY2014	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-155623000
CY2013	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-151331000
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-93739000
CY2013	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	146632000
CY2012	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	71784000
CY2013	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	6169000
CY2012	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-1016000
CY2014	istr	Increase Decrease Of Short Term Federal Home Loan Bank Advances IncreaseDecreaseOfShortTermFederalHomeLoanBankAdvances	90639000
CY2013	istr	Increase Decrease Of Short Term Federal Home Loan Bank Advances IncreaseDecreaseOfShortTermFederalHomeLoanBankAdvances	-12120000
CY2012	istr	Increase Decrease Of Short Term Federal Home Loan Bank Advances IncreaseDecreaseOfShortTermFederalHomeLoanBankAdvances	12120000
CY2013	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	20700000
CY2012	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	5850000
CY2014	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	3171000
CY2013	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	7557000
CY2012	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	750000
CY2013	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	169000
CY2013	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	23000
CY2012	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	16000
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	93595000
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-1238000
CY2011Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	5879000
CY2013	us-gaap	Income Taxes Paid IncomeTaxesPaid	1727000
CY2012	us-gaap	Income Taxes Paid IncomeTaxesPaid	650000
CY2012	us-gaap	Interest Paid InterestPaid	2538000
CY2012	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	550000
CY2013	us-gaap	Mortgage Loan Related To Property Sales1 MortgageLoanRelatedToPropertySales1	100000
CY2013Q4	us-gaap	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	5
CY2014	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>
CY2014	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 2013 and 2012 financial statements to be consistent with the 2014 presentation. </p></div>
CY2014Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	3568000
CY2014Q4	us-gaap	Trading Securities TradingSecurities	0
CY2013Q4	us-gaap	Trading Securities TradingSecurities	0
CY2014Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	37
CY2014	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses	53000
CY2014Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	6187000
CY2014	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses	86000
CY2014Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	12379000
CY2014	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1
CY2014	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0
CY2014Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	600000
CY2014Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	139000
CY2013Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	257000
CY2013Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	817000
CY2014Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	5000
CY2014Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	223000
CY2013Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	593000
CY2014	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Aggregate Losses AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses	139000
CY2013Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	108
CY2013Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	35215000
CY2013	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses	816000
CY2013Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	298000
CY2013	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses	1000
CY2013Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	35513000
CY2013	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Aggregate Losses AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses	817000
CY2014Q4	us-gaap	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	5
CY2014Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	6157000
CY2014	us-gaap	Heldtomaturity Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Loss HeldtomaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLoss	223000
CY2014Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	6157000
CY2014	us-gaap	Heldtomaturity Securities Continuous Unrealized Loss Position Aggregate Loss HeldtomaturitySecuritiesContinuousUnrealizedLossPositionAggregateLoss	223000
CY2013Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	5986000
CY2013	us-gaap	Heldtomaturity Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Loss HeldtomaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLoss	593000
CY2013Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	5986000
CY2013	us-gaap	Heldtomaturity Securities Continuous Unrealized Loss Position Aggregate Loss HeldtomaturitySecuritiesContinuousUnrealizedLossPositionAggregateLoss	593000
CY2014	us-gaap	Trading Securities Unrealized Holding Gain Loss TradingSecuritiesUnrealizedHoldingGainLoss	0
CY2013	us-gaap	Trading Securities Unrealized Holding Gain Loss TradingSecuritiesUnrealizedHoldingGainLoss	0
CY2014Q4	istr	Available For Sale Securities Debt Maturities Within One Year Fully Taxable Equivalent Yield AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFullyTaxableEquivalentYield	0.0121
CY2014Q4	istr	Available For Sale Securities Debt Maturities After One Through Five Years Fully Taxable Equivalent Yield AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFullyTaxableEquivalentYield	0.0166
CY2014Q4	istr	Available For Sale Securities Debt Maturities After Five Through Ten Years Fully Taxable Equivalent Yield AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFullyTaxableEquivalentYield	0.0248
CY2014Q4	istr	Available For Sale Securities Debt Maturities After Ten Years Fully Taxable Equivalent Yield AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFullyTaxableEquivalentYield	0.0233
CY2014Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	100000
CY2014Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	1871000
CY2014Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	17324000
CY2014Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	49991000
CY2013Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	2543000
CY2014Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	69286000
CY2014Q4	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	552000
CY2014Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	100000
CY2014Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	1868000
CY2014Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	17433000
CY2014Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	50364000
CY2014Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	69765000
CY2014Q4	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	534000
CY2014Q4	istr	Held To Maturity Securities Debt Maturities Within One Year Fully Taxable Equivalent Yield HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFullyTaxableEquivalentYield	0.0707
CY2014Q4	istr	Held To Maturity Securities Debt Maturities After One Through Five Years Fully Taxable Equivalent Yield HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFullyTaxableEquivalentYield	0.0707
CY2014Q4	istr	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fully Taxable Equivalent Yield HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFullyTaxableEquivalentYield	0.0707
CY2014Q4	istr	Held To Maturity Securities Debt Maturities After Ten Years Fully Taxable Equivalent Yield HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFullyTaxableEquivalentYield	0.0331
CY2014Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	620000
CY2014Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	2815000
CY2014Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	4365000
CY2014Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	14719000
CY2014Q4	istr	Amortized Cost Of Debt And Equity Securities AmortizedCostOfDebtAndEquitySecurities	22519000
CY2014Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	620000
CY2014Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	2815000
CY2014Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	4365000
CY2014Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	14501000
CY2014Q4	istr	Fair Value Of Debt And Equity Securities FairValueOfDebtAndEquitySecurities	22301000
CY2013Q4	istr	Available For Sale Securities Debt Maturities Within One Year Fully Taxable Equivalent Yield AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFullyTaxableEquivalentYield	0.0205
CY2013Q4	istr	Available For Sale Securities Debt Maturities After One Through Five Years Fully Taxable Equivalent Yield AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFullyTaxableEquivalentYield	0.0138
CY2013Q4	istr	Available For Sale Securities Debt Maturities After Five Through Ten Years Fully Taxable Equivalent Yield AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFullyTaxableEquivalentYield	0.0269
CY2013Q4	istr	Available For Sale Securities Debt Maturities After Ten Years Fully Taxable Equivalent Yield AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFullyTaxableEquivalentYield	0.0239
CY2013Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	697000
CY2013Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	10809000
CY2013Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	42178000
CY2013Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	56227000
CY2013Q4	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	506000
CY2013Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	702000
CY2013Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	2550000
CY2013Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	10707000
CY2013Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	41738000
CY2013Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	55697000
CY2013Q4	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	476000
CY2013Q4	istr	Held To Maturity Securities Debt Maturities Within One Year Fully Taxable Equivalent Yield HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFullyTaxableEquivalentYield	0.0000
CY2013Q4	istr	Held To Maturity Securities Debt Maturities After One Through Five Years Fully Taxable Equivalent Yield HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFullyTaxableEquivalentYield	0.0000
CY2013Q4	istr	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fully Taxable Equivalent Yield HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFullyTaxableEquivalentYield	0.0000
CY2013Q4	istr	Held To Maturity Securities Debt Maturities After Ten Years Fully Taxable Equivalent Yield HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFullyTaxableEquivalentYield	0.0226
CY2013Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	6579000
CY2013Q4	istr	Amortized Cost Of Debt And Equity Securities AmortizedCostOfDebtAndEquitySecurities	6579000
CY2013Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	5986000
CY2013Q4	istr	Fair Value Of Debt And Equity Securities FairValueOfDebtAndEquitySecurities	5986000
CY2014Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	622790000
CY2013Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	504095000
CY2014Q4	us-gaap	Financing Receivable Recorded Investment30 To59 Days Past Due FinancingReceivableRecordedInvestment30To59DaysPastDue	526000
CY2014Q4	us-gaap	Financing Receivable Recorded Investment60 To89 Days Past Due FinancingReceivableRecordedInvestment60To89DaysPastDue	61000
CY2014Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	3340000
CY2014Q4	istr	Financing Receivable Recorded Investment Past Due And Nonaccrual Status FinancingReceivableRecordedInvestmentPastDueAndNonaccrualStatus	3927000
CY2014Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	618863000
CY2013Q4	us-gaap	Financing Receivable Recorded Investment30 To59 Days Past Due FinancingReceivableRecordedInvestment30To59DaysPastDue	385000
CY2013Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	27359000
CY2014Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	617000
CY2013Q4	us-gaap	Financing Receivable Recorded Investment60 To89 Days Past Due FinancingReceivableRecordedInvestment60To89DaysPastDue	61000
CY2013Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	1489000
CY2013Q4	istr	Financing Receivable Recorded Investment Past Due And Nonaccrual Status FinancingReceivableRecordedInvestmentPastDueAndNonaccrualStatus	1935000
CY2013Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	502160000
CY2014Q4	istr	Loans By Borrower Grade Substandard Or Doubtful Or Doubtful Of Loss LoansByBorrowerGradeSubstandardOrDoubtfulOrDoubtfulOfLoss	0
CY2013Q4	istr	Loans By Borrower Grade Substandard Or Doubtful Or Doubtful Of Loss LoansByBorrowerGradeSubstandardOrDoubtfulOrDoubtfulOfLoss	0
CY2014Q4	istr	Loans Receivable Unpaid Principal Balance LoansReceivableUnpaidPrincipalBalance	189600000
CY2013Q4	istr	Loans Receivable Unpaid Principal Balance LoansReceivableUnpaidPrincipalBalance	59800000
CY2014Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	22750000
CY2013Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	11781000
CY2012Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	10969000
CY2013	istr	Loans And Leases Receivable Related Parties Acquisition LoansAndLeasesReceivableRelatedPartiesAcquisition	159000
CY2014	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	15277000
CY2013	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	3179000
CY2014	us-gaap	Loans And Leases Receivable Related Parties Collections LoansAndLeasesReceivableRelatedPartiesCollections	4308000
CY2013	us-gaap	Loans And Leases Receivable Related Parties Collections LoansAndLeasesReceivableRelatedPartiesCollections	2526000
CY2013Q2	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Outstanding Balance CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance	7470000
CY2013Q2	us-gaap	Certain Loans Acquired In Transfer Nonaccretable Difference CertainLoansAcquiredInTransferNonaccretableDifference	2102000
CY2013Q2	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period Cash Flows Expected To Be Collected At Acquisition CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodCashFlowsExpectedToBeCollectedAtAcquisition	5368000
CY2013Q2	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	468000
CY2013Q2	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesCarryingAmountNet	4900000
CY2013Q4	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesCarryingAmountNet	4900000
CY2013	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	150000
CY2013	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications To From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference	420000
CY2013	istr	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Payments Received Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesPaymentsReceivedNet	619000
CY2013	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Disposals Of Loans CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans	819000
CY2013Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	4032000
CY2014	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	161000
CY2014	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications To From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference	316000
CY2014	istr	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Payments Received Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesPaymentsReceivedNet	1044000
CY2014	istr	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Charges Offs CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesChargesOffs	59000
CY2014	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Disposals Of Loans CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans	628000
CY2014Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	2778000
CY2013Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	270000
CY2014Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	425000
CY2013Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	3380000
CY2012Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	2722000
CY2011Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	1746000
CY2014	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	459000
CY2013	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	389000
CY2012	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	181000
CY2014	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	81000
CY2013	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	21000
CY2012	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	472000
CY2014Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	4630000
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 Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	616612000
CY2014Q4	us-gaap	Financing Receivable Acquired With Deteriorated Credit Quality FinancingReceivableAcquiredWithDeterioratedCreditQuality	2778000
CY2013Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	4212000
CY2013Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	499883000
CY2013Q4	us-gaap	Financing Receivable Acquired With Deteriorated Credit Quality FinancingReceivableAcquiredWithDeterioratedCreditQuality	4032000
CY2012Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	119000
CY2012Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	2603000
CY2012Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	990000
CY2012Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	287763000
CY2012Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	288753000
CY2014Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	3387000
CY2014Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	3387000
CY2014	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	3603000
CY2014	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	106000
CY2014Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	180000
CY2014Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	180000
CY2014Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	70000
CY2014	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	179000
CY2014	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	4000
CY2014Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	3567000
CY2014	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	3782000
CY2014	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	110000
CY2013Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	4374000
CY2013Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	4079000
CY2013	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	4132000
CY2013	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	762000
CY2013Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	136000
CY2013Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	133000
CY2013Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	37000
CY2013	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	138000
CY2013	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	5000
CY2013Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	4510000
CY2013Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	4212000
CY2013	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	4270000
CY2013	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	767000
CY2012Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	740000
CY2012Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	736000
CY2012	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	772000
CY2012	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	42000
CY2012Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	256000
CY2012Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	254000
CY2012Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	119000
CY2012	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	255000
CY2012	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	17000
CY2012Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	996000
CY2012Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	990000
CY2012	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	1027000
CY2012	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	59000
CY2014	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	7
CY2013	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	7
CY2014Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	581000
CY2013Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	815000
CY2014	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	581000
CY2014	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	581000
CY2013	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	815000
CY2013	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	815000
CY2012Q4	us-gaap	Foreclosed Assets ForeclosedAssets	2276000
CY2013	istr	Real Estate Owned Transfers From Non Acquired Loans RealEstateOwnedTransfersFromNonAcquiredLoans	465000
CY2014	istr	Real Estate Owned Transfers From Acquired Loans RealEstateOwnedTransfersFromAcquiredLoans	706000
CY2013	istr	Real Estate Owned Transfers From Acquired Loans RealEstateOwnedTransfersFromAcquiredLoans	822000
CY2013	istr	Real Estate Owned Acquired Other Real Estate RealEstateOwnedAcquiredOtherRealEstate	1718000
CY2014	istr	Real Estate Owned Other Real Estate Sold RealEstateOwnedOtherRealEstateSold	1276000
CY2013	istr	Real Estate Owned Other Real Estate Sold RealEstateOwnedOtherRealEstateSold	1645000
CY2014Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	32502000
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	0
CY2014Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	12000
CY2014	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	62000
CY2013Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	158000
CY2013	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	459000
CY2014Q4	us-gaap	Finite Lived Core Deposits Gross FiniteLivedCoreDepositsGross	617000
CY2013Q4	us-gaap	Finite Lived Core Deposits Gross FiniteLivedCoreDepositsGross	617000
CY2014Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	85000
CY2013Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	44000
CY2014Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	532000
CY2013Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	573000
CY2014Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	41000
CY2014Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	41000
CY2014Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	41000
CY2014Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	41000
CY2014Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	41000
CY2014Q4	us-gaap	Interest Bearing Domestic Deposit Negotiable Order Of Withdrawal Now InterestBearingDomesticDepositNegotiableOrderOfWithdrawalNOW	116644000
CY2013Q4	us-gaap	Interest Bearing Domestic Deposit Negotiable Order Of Withdrawal Now InterestBearingDomesticDepositNegotiableOrderOfWithdrawalNOW	77190000
CY2014Q4	us-gaap	Interest Bearing Domestic Deposit Money Market InterestBearingDomesticDepositMoneyMarket	77589000
CY2013Q4	us-gaap	Interest Bearing Domestic Deposit Money Market InterestBearingDomesticDepositMoneyMarket	67006000
CY2014Q4	us-gaap	Interest Bearing Domestic Deposit Savings InterestBearingDomesticDepositSavings	53332000
CY2013Q4	us-gaap	Interest Bearing Domestic Deposit Savings InterestBearingDomesticDepositSavings	52177000
CY2014Q4	us-gaap	Interest Bearing Domestic Deposit Time Deposits InterestBearingDomesticDepositTimeDeposits	310336000
CY2013Q4	us-gaap	Interest Bearing Domestic Deposit Time Deposits InterestBearingDomesticDepositTimeDeposits	263438000
CY2014Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	263472000
CY2013Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	234192000
CY2014Q4	istr	Time Deposits100000 To249999 TimeDeposits100000To249999	13714000
CY2013Q4	istr	Time Deposits100000 To249999 TimeDeposits100000To249999	19647000
CY2014Q4	istr	Time Deposits250000 And Above TimeDeposits250000AndAbove	33150000
CY2013Q4	istr	Time Deposits250000 And Above TimeDeposits250000AndAbove	9599000
CY2014Q4	us-gaap	Time Deposits TimeDeposits	310336000
CY2013Q4	us-gaap	Time Deposits TimeDeposits	263438000
CY2014Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Or Less ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsOrLess	24193000
CY2013Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Or Less ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsOrLess	4430000
CY2014Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Through Six Months ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsThroughSixMonths	4788000
CY2013Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Through Six Months ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsThroughSixMonths	5225000
CY2014Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Six Months Through12 Months ContractualMaturitiesTimeDeposits100000OrMoreSixMonthsThrough12Months	7825000
CY2013Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Six Months Through12 Months ContractualMaturitiesTimeDeposits100000OrMoreSixMonthsThrough12Months	6852000
CY2014Q4	istr	Contractual Maturities Time Deposits100000 Or More One Year Through Three Years ContractualMaturitiesTimeDeposits100000OrMoreOneYearThroughThreeYears	8549000
CY2013Q4	istr	Contractual Maturities Time Deposits100000 Or More One Year Through Three Years ContractualMaturitiesTimeDeposits100000OrMoreOneYearThroughThreeYears	9737000
CY2014Q4	istr	Contractual Maturities Time Deposits100000 Or More After Three Years ContractualMaturitiesTimeDeposits100000OrMoreAfterThreeYears	1509000
CY2013Q4	istr	Contractual Maturities Time Deposits100000 Or More After Three Years ContractualMaturitiesTimeDeposits100000OrMoreAfterThreeYears	3002000
CY2014Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	46864000
CY2013Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	29246000
CY2014Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	190945000
CY2014Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	92895000
CY2014Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	17731000
CY2014Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	5255000
CY2014Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	3510000
CY2014Q4	istr	Deposits Public Funds Amount DepositsPublicFundsAmount	6900000
CY2013Q4	istr	Deposits Public Funds Amount DepositsPublicFundsAmount	3700000
CY2014Q4	us-gaap	Security Owned And Pledged As Collateral Fair Value SecurityOwnedAndPledgedAsCollateralFairValue	7100000
CY2013Q4	us-gaap	Security Owned And Pledged As Collateral Fair Value SecurityOwnedAndPledgedAsCollateralFairValue	1900000
CY2014Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	48900000
CY2013Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	39600000
CY2014Q4	us-gaap	Securities Sold Under Agreements To Repurchase Fair Value Of Collateral SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral	12700000
CY2014	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	14.00
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.94
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	13.33
CY2011	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y10M17D
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P5Y10M17D
CY2013	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y10M17D
CY2014	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P8Y11M16D
CY2014	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P3Y10M17D
CY2013Q4	us-gaap	Securities Sold Under Agreements To Repurchase Fair Value Of Collateral SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral	13100000
CY2014Q4	us-gaap	Assets Sold Under Agreements To Repurchase Interest Rate AssetsSoldUnderAgreementsToRepurchaseInterestRate	0.0020
CY2013Q4	us-gaap	Assets Sold Under Agreements To Repurchase Interest Rate AssetsSoldUnderAgreementsToRepurchaseInterestRate	0.0020
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	2450000
CY2014Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From One To Two Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate	104339000
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From One To Two Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate	13700000
CY2014Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate	15534000
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate	11209000
CY2014Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Three To Four Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate	4712000
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Three To Four Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate	2259000
CY2014Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Four To Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate	850000
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Four To Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate	850000
CY2014Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due After Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate	350000
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due After Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate	350000
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Of Amounts Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate	0.0140
CY2014Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate One To Two Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate	0.0016
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate One To Two Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate	0.0069
CY2014Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Two To Three Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate	0.0075
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Two To Three Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate	0.0084
CY2014Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Three To Four Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate	0.0096
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Three To Four Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate	0.0097
CY2014Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Four To Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate	0.0093
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Four To Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate	0.0093
CY2014Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate After Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterFiveYearsFromBalanceSheetDate	0.0150
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate After Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterFiveYearsFromBalanceSheetDate	0.0150
CY2014Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Weighted Average Interest Rate FederalHomeLoanBankAdvancesBranchOfFHLBBankWeightedAverageInterestRate	0.0027
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Weighted Average Interest Rate FederalHomeLoanBankAdvancesBranchOfFHLBBankWeightedAverageInterestRate	0.0084
CY2014Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Amount Of Available Unused Funds FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds	142300000
CY2014Q4	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	33600000
CY2014Q4	us-gaap	Line Of Credit LineOfCredit	0
CY2014	us-gaap	Debt Instrument Description Of Variable Rate Basis DebtInstrumentDescriptionOfVariableRateBasis	The capital security pays a cumulative quarterly distribution using a floating rate at three month LIBOR + 1.77% of the liquidation amounts
CY2014	us-gaap	Debt Instrument Basis Spread On Variable Rate1 DebtInstrumentBasisSpreadOnVariableRate1	0.0177
CY2014	us-gaap	Debt Instrument Maturity Date DebtInstrumentMaturityDate	2036-06-15
CY2014	us-gaap	Maximum Length Of Time Hedged In Interest Rate Cash Flow Hedge1 MaximumLengthOfTimeHedgedInInterestRateCashFlowHedge1	P5Y
CY2014Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	20000000
CY2014	us-gaap	Derivative Instruments Loss Recognized In Other Comprehensive Income Effective Portion DerivativeInstrumentsLossRecognizedInOtherComprehensiveIncomeEffectivePortion	200000
CY2014Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	303000
CY2014Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000
CY2014Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2011Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	2742205
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	3210816
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	47186
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	16875
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	30311
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	7500
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
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	22811
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.33
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	13.33
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.33
CY2013	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	13.33
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.33
CY2012	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	0
CY2013	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	0
CY2014Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	700000
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0036
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.1901
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0217
CY2014	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P7Y
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	3.44
CY2014	istr	Minimum Service Period For Participation In Defined Benefit Plan MinimumServicePeriodForParticipationInDefinedBenefitPlan	P90D
CY2014	us-gaap	Defined Contribution Plan Employers Matching Contribution Annual Vesting Percentage DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage	1.00
CY2014	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	400000
CY2013	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	200000
CY2012	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	200000
CY2014Q4	istr	Deferred Compensation Arrangement With Individual Monthly Distribution DeferredCompensationArrangementWithIndividualMonthlyDistribution	2000
CY2014	istr	Deferred Compensation Arrangement Maximum Contractual Term DeferredCompensationArrangementMaximumContractualTerm	2020
CY2014	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1279000
CY2013	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	375000
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	958000
CY2014	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-134000
CY2013	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	773000
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	21000
CY2014	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.34
CY2013	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.34
CY2014	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	2224000
CY2013	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1468000
CY2014	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	118000
CY2013	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	112000
CY2013	istr	Income Tax Reconciliation Purchase Accounting Adjustment IncomeTaxReconciliationPurchaseAccountingAdjustment	-300000
CY2013	istr	Income Tax Reconciliation Acquisition Costs IncomeTaxReconciliationAcquisitionCosts	48000
CY2014	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	1002000
CY2014	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	41000
CY2013	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	44000
CY2014	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.175
CY2013	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.261
CY2014Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1435000
CY2013Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1303000
CY2012Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	961000
CY2014Q4	istr	Deferred Tax Liabilities Federal Home Loan Bank Stock Dividend DeferredTaxLiabilitiesFederalHomeLoanBankStockDividend	16000
CY2013Q4	istr	Deferred Tax Liabilities Federal Home Loan Bank Stock Dividend DeferredTaxLiabilitiesFederalHomeLoanBankStockDividend	30000
CY2012Q4	istr	Deferred Tax Liabilities Federal Home Loan Bank Stock Dividend DeferredTaxLiabilitiesFederalHomeLoanBankStockDividend	7000
CY2014Q4	istr	Deferred Tax Liabilities Basis Difference In Acquired Assets And Liabilities DeferredTaxLiabilitiesBasisDifferenceInAcquiredAssetsAndLiabilities	296000
CY2013Q4	istr	Deferred Tax Liabilities Basis Difference In Acquired Assets And Liabilities DeferredTaxLiabilitiesBasisDifferenceInAcquiredAssetsAndLiabilities	310000
CY2012Q4	istr	Deferred Tax Liabilities Basis Difference In Acquired Assets And Liabilities DeferredTaxLiabilitiesBasisDifferenceInAcquiredAssetsAndLiabilities	14000
CY2014Q4	istr	Deferred Tax Liabilities Unrealized Gains On Available For Sale Securities DeferredTaxLiabilitiesUnrealizedGainsOnAvailableForSaleSecurities	62000
CY2012Q4	istr	Deferred Tax Liabilities Unrealized Gains On Available For Sale Securities DeferredTaxLiabilitiesUnrealizedGainsOnAvailableForSaleSecurities	343000
CY2014Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1809000
CY2013Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1643000
CY2012Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1325000
CY2014Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	879000
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	377000
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	636000
CY2014Q4	istr	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Other Real Estate Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForOtherRealEstateLosses	517000
CY2013Q4	istr	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Other Real Estate Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForOtherRealEstateLosses	544000
CY2012Q4	istr	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Other Real Estate Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForOtherRealEstateLosses	13000
CY2013Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	180000
CY2014Q4	istr	Deferred Tax Assets Unamortized Start Up Cost DeferredTaxAssetsUnamortizedStartUpCost	165000
CY2013Q4	istr	Deferred Tax Assets Unamortized Start Up Cost DeferredTaxAssetsUnamortizedStartUpCost	187000
CY2012Q4	istr	Deferred Tax Assets Unamortized Start Up Cost DeferredTaxAssetsUnamortizedStartUpCost	213000
CY2014Q4	istr	Deferred Tax Assets Unamortized Organization Costs DeferredTaxAssetsUnamortizedOrganizationCosts	20000
CY2013Q4	istr	Deferred Tax Assets Unamortized Organization Costs DeferredTaxAssetsUnamortizedOrganizationCosts	22000
CY2012Q4	istr	Deferred Tax Assets Unamortized Organization Costs DeferredTaxAssetsUnamortizedOrganizationCosts	12000
CY2014Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	617000
CY2013Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	833000
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	595000
CY2013Q4	istr	Deferred Tax Assets Deferred Gain On Sale Of Other Real Estate DeferredTaxAssetsDeferredGainOnSaleOfOtherRealEstate	90000
CY2012Q4	istr	Deferred Tax Assets Deferred Gain On Sale Of Other Real Estate DeferredTaxAssetsDeferredGainOnSaleOfOtherRealEstate	93000
CY2014Q4	istr	Deferred Tax Assets Basis Difference In Acquired Assets And Liabilities DeferredTaxAssetsBasisDifferenceInAcquiredAssetsAndLiabilities	342000
CY2013Q4	istr	Deferred Tax Assets Basis Difference In Acquired Assets And Liabilities DeferredTaxAssetsBasisDifferenceInAcquiredAssetsAndLiabilities	490000
CY2014Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	41000
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	49000
CY2014Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Other DeferredTaxAssetsTaxCreditCarryforwardsOther	226000
CY2014Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	12000
CY2013Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	12000
CY2012Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	12000
CY2014Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	2906000
CY2013Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	2848000
CY2012Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	1621000
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	296000
CY2014Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	1800000
CY2013Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	2500000
CY2014	istr	Short Term Debt Maturity Period ShortTermDebtMaturityPeriod	P90D
CY2014Q4	us-gaap	Liabilities Fair Value Disclosure Nonrecurring LiabilitiesFairValueDisclosureNonrecurring	0
CY2013Q4	us-gaap	Liabilities Fair Value Disclosure Nonrecurring LiabilitiesFairValueDisclosureNonrecurring	0
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	19012000
CY2014Q4	us-gaap	Investments Investments	92818000
CY2014Q4	us-gaap	Loans Receivable Net LoansReceivableNet	721556000
CY2014Q4	istr	Federal Home Loan Bank Advances Short Term And Repurchase Agreements FederalHomeLoanBankAdvancesShortTermAndRepurchaseAgreements	116632000
CY2014Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	21446000
CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	27703000
CY2013Q4	us-gaap	Investments Investments	62752000
CY2013Q4	us-gaap	Loans Receivable Net LoansReceivableNet	505744000
CY2013Q4	istr	Federal Home Loan Bank Advances Short Term And Repurchase Agreements FederalHomeLoanBankAdvancesShortTermAndRepurchaseAgreements	10203000
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	30818000
CY2014Q4	us-gaap	Statutory Accounting Practices Statutory Amount Available For Dividend Payments Without Regulatory Approval StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval	8200000
CY2014Q4	istr	Total Risk Based Capital Ratio Required For Capital Adequacy TotalRiskBasedCapitalRatioRequiredForCapitalAdequacy	0.080
CY2014Q4	istr	Tier One Risk Based Capital Ratio Required For Capital Adequacy TierOneRiskBasedCapitalRatioRequiredForCapitalAdequacy	0.060
CY2014Q4	istr	Common Equity Tier One Capital Ratio Required For Capital Adequacy CommonEquityTierOneCapitalRatioRequiredForCapitalAdequacy	0.045
CY2014Q4	istr	Tier One Leverage Capital Ratio Required For Capital Adequacy TierOneLeverageCapitalRatioRequiredForCapitalAdequacy	0.040
CY2014Q4	us-gaap	Unused Commitments To Extend Credit UnusedCommitmentsToExtendCredit	91500000
CY2013Q4	us-gaap	Unused Commitments To Extend Credit UnusedCommitmentsToExtendCredit	67100000
CY2014Q4	istr	Average Reserve Balance Maintained With Federal Reserve Bank AverageReserveBalanceMaintainedWithFederalReserveBank	12900000
CY2013Q4	istr	Average Reserve Balance Maintained With Federal Reserve Bank AverageReserveBalanceMaintainedWithFederalReserveBank	4600000
CY2014Q4	istr	Area Of Building AreaOfBuilding	2240
CY2014	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5533514
CY2013	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	3667929
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2998087
CY2014	istr	Incremental Common Shares Attributable To Restricted Stock IncrementalCommonSharesAttributableToRestrictedStock	41467
CY2013	istr	Incremental Common Shares Attributable To Restricted Stock IncrementalCommonSharesAttributableToRestrictedStock	32141
CY2012	istr	Incremental Common Shares Attributable To Restricted Stock IncrementalCommonSharesAttributableToRestrictedStock	11704
CY2014	istr	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	22811
CY2013	istr	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	29773
CY2012	istr	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	39255
CY2014	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	5777302
CY2014	istr	Incremental Common Shares Attributable To Warrants IncrementalCommonSharesAttributableToWarrants	179510
CY2013	istr	Incremental Common Shares Attributable To Warrants IncrementalCommonSharesAttributableToWarrants	193532
CY2012	istr	Incremental Common Shares Attributable To Warrants IncrementalCommonSharesAttributableToWarrants	253615
CY2013	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	3923375
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	3302661
CY2014Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	6957000
CY2014Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	7407000
CY2014Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	8182000
CY2014Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	8822000
CY2014Q1	us-gaap	Interest Expense InterestExpense	1090000
CY2014Q2	us-gaap	Interest Expense InterestExpense	1158000
CY2014Q3	us-gaap	Interest Expense InterestExpense	1182000
CY2014Q4	us-gaap	Interest Expense InterestExpense	1245000
CY2014Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	5867000
CY2014Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	6249000
CY2014Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	7000000
CY2014Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	7577000
CY2014Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	245000
CY2014Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	448000
CY2014Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	505000
CY2014Q4	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	430000
CY2014Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	5622000
CY2014Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	5801000
CY2014Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	6495000
CY2014Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	7147000
CY2014Q1	us-gaap	Noninterest Income NoninterestIncome	1066000
CY2014Q2	us-gaap	Noninterest Income NoninterestIncome	1509000
CY2014Q3	us-gaap	Noninterest Income NoninterestIncome	1959000
CY2014Q4	us-gaap	Noninterest Income NoninterestIncome	1325000
CY2014Q1	us-gaap	Noninterest Expense NoninterestExpense	5385000
CY2014Q2	us-gaap	Noninterest Expense NoninterestExpense	5729000
CY2014Q3	us-gaap	Noninterest Expense NoninterestExpense	6313000
CY2014Q4	us-gaap	Noninterest Expense NoninterestExpense	6955000
CY2014Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1303000
CY2014Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1581000
CY2014Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2141000
CY2014Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1517000
CY2014Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	424000
CY2014Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	514000
CY2014Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	699000
CY2014Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-491000
CY2014Q1	us-gaap	Net Income Loss NetIncomeLoss	879000
CY2014Q2	us-gaap	Net Income Loss NetIncomeLoss	1067000
CY2014Q3	us-gaap	Net Income Loss NetIncomeLoss	1442000
CY2014Q4	us-gaap	Net Income Loss NetIncomeLoss	2008000
CY2014Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.23
CY2014Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.27
CY2014Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
CY2014Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2014Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.21
CY2014Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.26
CY2014Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
CY2014Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.27
CY2013Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	4083000
CY2013Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	5553000
CY2013Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	6231000
CY2013Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	6605000
CY2013Q1	us-gaap	Interest Expense InterestExpense	691000
CY2013Q2	us-gaap	Interest Expense InterestExpense	836000
CY2013Q3	us-gaap	Interest Expense InterestExpense	932000
CY2013Q4	us-gaap	Interest Expense InterestExpense	1002000
CY2013Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	3392000
CY2013Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	4717000
CY2013Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	5299000
CY2013Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	5603000
CY2013Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	89000
CY2013Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	143000
CY2013Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	108000
CY2013Q4	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	686000
CY2013Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	3303000
CY2013Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	4574000
CY2013Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	5191000
CY2013Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	4917000
CY2013Q1	us-gaap	Noninterest Income NoninterestIncome	1170000
CY2013Q2	us-gaap	Noninterest Income NoninterestIncome	2193000
CY2013Q3	us-gaap	Noninterest Income NoninterestIncome	1023000
CY2013Q4	us-gaap	Noninterest Income NoninterestIncome	969000
CY2013Q1	us-gaap	Noninterest Expense NoninterestExpense	3574000
CY2013Q2	us-gaap	Noninterest Expense NoninterestExpense	4615000
CY2013Q3	us-gaap	Noninterest Expense NoninterestExpense	5218000
CY2013Q4	us-gaap	Noninterest Expense NoninterestExpense	5618000
CY2013Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	899000
CY2013Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2152000
CY2013Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	996000
CY2013Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	268000
CY2013Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	281000
CY2013Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	455000
CY2013Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	322000
CY2013Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	90000
CY2013Q1	us-gaap	Net Income Loss NetIncomeLoss	618000
CY2013Q2	us-gaap	Net Income Loss NetIncomeLoss	1697000
CY2013Q3	us-gaap	Net Income Loss NetIncomeLoss	674000
CY2013Q4	us-gaap	Net Income Loss NetIncomeLoss	178000
CY2013Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.19
CY2013Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.47
CY2013Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.17
CY2013Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.05
CY2013Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.18
CY2013Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.44
CY2013Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.16
CY2013Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.04

Files In Submission

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$ISTR
Investar Holding Corp Stock $istr

2014 Q4 Form 10-K Financial Statement

#000156459015002171 Filed on March 31, 2015

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

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$ISTR Investar Holding Corp Stock $istr

2014 Q4 Form 10-K Financial Statement

#000156459015002171 Filed on March 31, 2015

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ISTR
Investar Holding Corp Stock $istr