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Consolidated Statements of Cash Flows (Parentheticals) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2014
Net cash received at closing |  |  | 3,025,073 qcrh_NetCashReceivedAtClosing
Issuance of shares of common stock | 834,715 us-gaap_StockIssuedDuringPeriodSharesNewIssues |  |
Net cash paid at closing |  |  | 30,425,618 qcrh_NetCashPaidAtClosing
Series F Noncumulative Perpetual Preferred Stock One [Member] |  |  |
Redemption of shares of Series F Noncumulative Perpetual Preferred Stock, net |  | 10,223 us-gaap_StockRedeemedOrCalledDuringPeriodShares / us-gaap_StatementClassOfStockAxis = qcrh_SeriesFNoncumulativePerpetualPreferredStockOneMember |
Series F Noncumulative Perpetual Preferred Stock Two [Member] |  |  |
Redemption of shares of Series F Noncumulative Perpetual Preferred Stock, net |  |  | 29,867 us-gaap_StockRedeemedOrCalledDuringPeriodShares / us-gaap_StatementClassOfStockAxis = qcrh_SeriesFNoncumulativePerpetualPreferredStockTwoMember

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