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Note 2 - Community National Bancorporation and Community National Bank (Details) (USD $) | 0 Months Ended | 1 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended | 0 Months Ended |  |
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May 14, 2013 | Aug. 27, 2012 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Sep. 11, 2012 | May 13, 2013 | May 13, 2013 | Jun. 27, 2013 | Aug. 27, 2012 | Jun. 26, 2013 | Aug. 31, 2005
Note 2 - Community National Bancorporation and Community National Bank (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred | $ 19,441,834 us-gaap_BusinessCombinationConsiderationTransferred1 |  |  |  | $ 19,441,834 us-gaap_BusinessCombinationConsiderationTransferred1 |  |  |  |  |  |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in Shares) | 834,715 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross | 6,261,684 us-gaap_PaymentsToAcquireBusinessesGross |  |  | [1] | 6,261,684 us-gaap_PaymentsToAcquireBusinessesGross | [1] |  | [1] |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables | 195,658,486 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables |  |  |  | 195,658,486 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables |  |  |  |  |  |  |  |  |  |
Debt Instrument, Unamortized Discount |  |  | (2,363,265)us-gaap_DebtInstrumentUnamortizedDiscount |  | (2,497,170)us-gaap_DebtInstrumentUnamortizedDiscount |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other | 3,911,053 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther |  |  |  | 3,911,053 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  |  | 346,550,159 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity |  | 351,291,107 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity |  |  |  |  |  |  |  |  |  |
Business Combination, Bargain Purchase, Gain Recognized, Amount | 1,841,385 us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount |  |  |  | 1,841,385 us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount |  |  |  |  |  |  |  |  |  |
Business Combination, Acquisition Related Costs |  |  |  |  | 2,353,162 us-gaap_BusinessCombinationAcquisitionRelatedCosts |  |  |  |  |  |  |  |  |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal |  |  |  |  | 2,334,216 us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Liabilities Incurred |  | 2,847,687 us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred |  |  |  |  |  |  |  |  |  |  |  |  |
Accretion Expense |  |  | 674,539 us-gaap_AccretionExpense |  | 1,060,708 us-gaap_AccretionExpense |  |  |  |  |  |  |  |  |  |
Other Liabilities |  |  | 38,653,681 us-gaap_OtherLiabilities |  | 37,003,742 us-gaap_OtherLiabilities |  |  |  |  |  |  |  |  |  |
CNB Branches [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Note 2 - Community National Bancorporation and Community National Bank (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal |  |  |  |  | 2,334,216 us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = qcrh_CNBBranchesMember |  |  |  |  |  |  |  |  |  |
m2 Chief Executive Officer [Member] | m2 Lease Funds LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Note 2 - Community National Bancorporation and Community National Bank (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability |  |  | 701,634 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = qcrh_M2ChiefExecutiveOfficerMember |  | 725,483 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = qcrh_M2ChiefExecutiveOfficerMember |  | 195,715 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = qcrh_M2ChiefExecutiveOfficerMember |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability |  |  | 1,622,832 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = qcrh_M2ChiefExecutiveOfficerMember |  | 921,198 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = qcrh_M2ChiefExecutiveOfficerMember |  | 195,715 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = qcrh_M2ChiefExecutiveOfficerMember |  |  |  |  |  |  |  |
m2 Chief Executive Officer [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Note 2 - Community National Bancorporation and Community National Bank (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accretion Expense |  |  |  |  |  |  | 47,759 us-gaap_AccretionExpense / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = qcrh_M2ChiefExecutiveOfficerMember |  |  |  |  |  |  |  |
Undiscounted [Member] | m2 Lease Funds LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Note 2 - Community National Bancorporation and Community National Bank (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Liabilities Incurred |  |  |  |  |  |  |  |  | 3,307,509 us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember / us-gaap_StatementScenarioAxis = qcrh_UndiscountedMember |  |  |  |  |  |
Core Deposits [Member] | Community National Bancorporation and Community National Bank [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Note 2 - Community National Bancorporation and Community National Bank (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months |  |  |  |  |  |  |  |  |  | 199,512 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CoreDepositsMember | 199,512 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CoreDepositsMember |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Two |  |  |  |  |  |  |  |  |  | 199,512 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CoreDepositsMember | 199,512 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CoreDepositsMember |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Three |  |  |  |  |  |  |  |  |  | 199,512 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CoreDepositsMember | 199,512 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CoreDepositsMember |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Four |  |  |  |  |  |  |  |  |  | 199,512 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CoreDepositsMember | 199,512 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CoreDepositsMember |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Five |  |  |  |  |  |  |  |  |  | 199,512 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CoreDepositsMember | 199,512 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CoreDepositsMember |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, after Year Five |  |  |  |  |  |  |  |  |  | 673,361 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CoreDepositsMember | 673,361 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CoreDepositsMember |  |  |  |
Core Deposits [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Note 2 - Community National Bancorporation and Community National Bank (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Core Deposits, Gross |  |  | 1,995,127 us-gaap_FiniteLivedCoreDepositsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CoreDepositsMember |  | 1,995,127 us-gaap_FiniteLivedCoreDepositsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CoreDepositsMember |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] | Community National Bancorporation and Community National Bank [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Note 2 - Community National Bancorporation and Community National Bank (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity |  |  |  |  |  |  |  |  |  | 4,400,000 us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember | 4,400,000 us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |
Line of Credit Facility, Revolving Days |  |  |  |  |  |  |  |  |  |  | 364 days |  |  |  |
Long-term Line of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,000,000 us-gaap_LineOfCredit / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
Debt Instrument, Basis Spread on Variable Rate |  |  | 2.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Note 2 - Community National Bancorporation and Community National Bank (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity |  |  | 10,000,000 us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit |  |  | 0 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  | 0 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |  |  |  |  |  |  |
Community National Bancorporation and Community National Bank [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Note 2 - Community National Bancorporation and Community National Bank (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  | 3.17%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |  | 3.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |
Community National Bancorporation and Community National Bank [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Note 2 - Community National Bancorporation and Community National Bank (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  |  |  | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  |  |  |
Business Combination, Consideration Transferred |  |  |  |  |  |  |  |  |  |  | 19,441,834 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in Shares) |  |  |  |  |  |  |  |  |  |  | 834,715 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned |  |  |  |  |  |  |  |  |  | 13,180,150 us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember | 13,180,150 us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  |  |  |  |  |  |  |  | 6,261,684 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  |  |  |
Finite-Lived Core Deposits, Gross |  |  |  |  |  |  |  |  |  | 3,440,076 us-gaap_FiniteLivedCoreDepositsGross / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember | 3,440,076 us-gaap_FiniteLivedCoreDepositsGross / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  |  |  |
Certain Loans Acquired in Transfer, Accretable Yield |  |  | 1,215,398 us-gaap_CertainLoansAcquiredInTransferAccretableYield / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  | 2,068,332 us-gaap_CertainLoansAcquiredInTransferAccretableYield / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  |  |  |  | 4,128,315 us-gaap_CertainLoansAcquiredInTransferAccretableYield / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember | 4,128,315 us-gaap_CertainLoansAcquiredInTransferAccretableYield / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  |  |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, Reclassifications to Nonaccretable Difference |  |  | 98,615 us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToNonaccretableDifference / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  | 233,933 us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToNonaccretableDifference / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  |  |  |  | 397,894 us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToNonaccretableDifference / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  |  |  |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Outstanding Balance |  |  |  |  |  |  |  |  |  | 6,702,000 us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesOutstandingBalance / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember | 6,702,000 us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesOutstandingBalance / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  |  |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value |  |  |  |  |  |  |  |  |  | 4,125,175 us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember | 4,125,175 us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  |  |  |
Debt Instrument, Unamortized Discount |  |  |  |  |  |  |  |  |  | 2,576,825 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember | 2,576,825 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other |  |  |  |  |  |  |  |  |  | 3,950,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember | 3,950,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  |  |  |
Termination Loans |  |  |  |  |  |  |  |  |  |  |  | 10,000,000 us-gaap_TerminationLoans / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  |  |
Term Loan Period |  |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  |  | 10,000,000 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Bargain Purchase, Gain Recognized, Amount |  |  |  |  | 1,841,385 us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  |  |  |  |  |  |  |  |  |
Business Combination, Acquisition Related Costs |  |  |  |  | 2,353,162 us-gaap_BusinessCombinationAcquisitionRelatedCosts / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember |  |  |  |  |  |  |  |  |  |
Community National Bancorporation and Community National Bank [Member] | Reported Value Measurement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Note 2 - Community National Bancorporation and Community National Bank (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables |  |  |  |  |  |  |  |  |  | 3,033,022 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember | 3,033,022 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |  |  |  |
Community National Bancorporation and Community National Bank [Member] | Estimate of Fair Value Measurement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Note 2 - Community National Bancorporation and Community National Bank (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables |  |  |  |  |  |  |  |  |  | 2,207,891 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | 2,207,891 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |  |  |  |
m2 Lease Funds LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Note 2 - Community National Bancorporation and Community National Bank (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  | 20.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember |  |  |  |  |  |  |  |  |  |  | 20.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember |  | 80.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember
Business Combination, Consideration Transferred |  | 4,501,442 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned |  | 2,133,417 us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember |  |  |  |  |  |  |  |  |  |  | 2,133,417 us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember |  |
Payments to Acquire Businesses, Gross |  |  |  |  |  |  |  |  | 1,653,755 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember |  |  |  |  |  |
Debt Instrument, Unamortized Discount |  | 459,822 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember |  |  |  |  |  |  |  |  |  |  | 459,822 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember |  |
Fair Value Inputs, Discount Rate |  |  |  |  |  |  |  |  |  |  |  |  | 5.00%us-gaap_FairValueInputsDiscountRate / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember |  |
Accretion Expense |  |  | 155,716 us-gaap_AccretionExpense / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember |  | 148,137 us-gaap_AccretionExpense / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember |  |  |  |  |  |  |  |  |  |
Other Liabilities |  |  | $ 3,199,298 us-gaap_OtherLiabilities / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember |  | $ 3,043,582 us-gaap_OtherLiabilities / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember |  | $ 2,895,445 us-gaap_OtherLiabilities / us-gaap_BusinessAcquisitionAxis = qcrh_M2LeaseFundsLLCMember |  |  |  |  |  |  |  |
[1] | Net cash received at closing totaled $3,025,073

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition The aggregate carrying amount, as of the balance sheet date, of liabilities not separately disclosed in the balance sheet. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition Definite liabilities to third parties under a termination loan agreement, whether or not guaranteed in whole or in part by the government. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 912 -SubTopic 405 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6471918&loc=d3e56288-109415 + Details
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