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Consolidated Statements of Comprehensive Income (Unaudited) (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
Net income | $ 4,177,889 us-gaap_ProfitLoss | $ 3,889,215 us-gaap_ProfitLoss
Unrealized gains on securities available for sale: |  |
Unrealized holding gains arising during the period before tax | 4,402,337 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax | 8,490,174 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax
Less reclassification adjustment for gains included in net income before tax | 421,066 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax | 20,625 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax
| 3,981,271 us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax | 8,469,549 us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax
Unrealized losses on interest rate cap derivatives: |  |
Unrealized holding losses arising during the period before tax | (372,384)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax |
Less reclassification adjustment for ineffectiveness and caplet amortization before tax | 901 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax |
| (373,285)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax |
Other comprehensive income, before tax | 3,607,986 us-gaap_OtherComprehensiveIncomeLossBeforeTax | 8,469,549 us-gaap_OtherComprehensiveIncomeLossBeforeTax
Tax expense | 1,387,121 us-gaap_OtherComprehensiveIncomeLossTax | 3,238,765 us-gaap_OtherComprehensiveIncomeLossTax
Other comprehensive income, net of tax | 2,220,865 us-gaap_OtherComprehensiveIncomeLossNetOfTax | 5,230,784 us-gaap_OtherComprehensiveIncomeLossNetOfTax
Comprehensive income attributable to QCR Holdings, Inc. | $ 6,398,754 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | $ 9,119,999 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

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