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v2.4.1.9

Consolidated Statement of Changes in Stockholders' Equity (Parentheticals) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Common cash dividends (in Dollars per share) | $ 0.08 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.08 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.08 us-gaap_CommonStockDividendsPerShareDeclared
Proceeds from issuance of shares of common stock as a result of stock options exercised | 23,659 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | 41,258 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | 17,876 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Unrealized gains on securities available for sale, tax (in Dollars) | $ 12,108,137 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax |  |
Unrealized losses on interest rate caps derivatives, tax (in Dollars) | $ (399,367)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax |  |
Series F Noncumulative Perpetual Preferred Stock [Member] |  |  |
Redemption of shares of Noncumulative Perpetual Preferred Stock | 29,867 us-gaap_StockRedeemedOrCalledDuringPeriodShares / us-gaap_StatementClassOfStockAxis = qcrh_SeriesFNoncumulativePerpetualPreferredStockMember |  | 10,223 us-gaap_StockRedeemedOrCalledDuringPeriodShares / us-gaap_StatementClassOfStockAxis = qcrh_SeriesFNoncumulativePerpetualPreferredStockMember
Series E Non-Cumulative Perpetual Preferred Stock [Member] | Preferred Stock [Member] |  |  |
Conversion of shares Non-cumulative Perpetual Preferred Stock |  | 25,000 us-gaap_ConversionOfStockSharesConverted1 / us-gaap_StatementClassOfStockAxis = qcrh_SeriesENonCumulativePerpetualPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember |
Common Stock [Member] |  |  |
Proceeds from issuance of shares of common stock as a result of stock purchased under the Employee Stock Purchase Plan | 25,321 us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 27,110 us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 31,554 us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Proceeds from issuance of shares of common stock as a result of stock options exercised | 23,659 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 41,258 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 17,876 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Exchange of shares of common stock in connection with stock options exercised |  | 7,679 qcrh_SharesOfCommonStockExchangedInConnectionWithStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 611 qcrh_SharesOfCommonStockExchangedInConnectionWithStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Exchange of shares of common stock in connection with payroll taxes for restricted stock |  |  | 576 us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Proceeds from exercise of warrants to purchase shares of common stock issued in conjunction with the Series A Subordinated Notes |  |  | 54,000 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Issuance of shares of common stock as a result of the acquisition of Community National Bancorporation, net |  | 834,715 us-gaap_StockIssuedDuringPeriodSharesAcquisitions / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
Conversion to shares of common stock |  | 2,057,502 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
Exchange of shares of common stock in connection with restricted stock vested | 10,300 qcrh_ExchangeOfSharesOfCommonStockInConnectionWithRestrictedStockVestedShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 16,798 qcrh_ExchangeOfSharesOfCommonStockInConnectionWithRestrictedStockVestedShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |

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