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Note 10 - FHLB Advances - Summary of Prepayments of FHLB Advances (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2016
Federal Home Loan Banks [Abstract] |  |  |  |
Amount | $ 15,000,000 | $ 5,000,000 | $ 10,000,000 | $ 30,000,000
Weighted Average Interest Rate | 3.14% | 2.84% | 3.86% | 3.33%
Prepayment Fees | $ 357,161 | $ 127,310 | $ 524,197 | $ 1,008,668

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- Definition The weighted average interest rate of Advances from federal Home Loan Bank Bank that paid prior to maturity during the period. + References No definition available. + Details
Name: | qcrh_FederalHomeLoanBankAdvancesPrepaymentWeightedAverageInterestRate
Namespace Prefix: | qcrh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of fees paid for prepayment of certain Federal Home Loan Bank (FHLBank) advances before original maturity. + References No definition available. + Details
Name: | qcrh_PrepaymentFeesOnFederalHomeLoanBankAdvances
Namespace Prefix: | qcrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The cash outflow for the payment of loan drawn from Federal Home Loan, excluding prepayment fees. + References No definition available. + Details
Name: | qcrh_RepaymentsOfFederalHomeLoanBankBorrowingsExcludingPrepaymentFees
Namespace Prefix: | qcrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_FederalHomeLoanBanksAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration