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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
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 $ 19,441,834us-gaap_BusinessCombinationConsiderationTransferred1     $ 19,441,834us-gaap_BusinessCombinationConsiderationTransferred1                
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in Shares) 834,715us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued                      
Payments to Acquire Businesses, Gross 6,261,684us-gaap_PaymentsToAcquireBusinessesGross      [1] 6,261,684us-gaap_PaymentsToAcquireBusinessesGross [1]    [1]              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables 195,658,486us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables     195,658,486us-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 3,911,053us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther     3,911,053us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther                
Line of Credit Facility, Remaining Borrowing Capacity     346,550,159us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity 351,291,107us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity                
Business Combination, Bargain Purchase, Gain Recognized, Amount 1,841,385us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount     1,841,385us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount                
Business Combination, Acquisition Related Costs       2,353,162us-gaap_BusinessCombinationAcquisitionRelatedCosts                
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal       2,334,216us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal                
Business Combination, Consideration Transferred, Liabilities Incurred   2,847,687us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred                    
Accretion Expense     674,539us-gaap_AccretionExpense 1,060,708us-gaap_AccretionExpense                
Other Liabilities     38,653,681us-gaap_OtherLiabilities 37,003,742us-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       2,334,216us-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     701,634us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
/ us-gaap_BusinessAcquisitionAxis
= qcrh_M2LeaseFundsLLCMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= qcrh_M2ChiefExecutiveOfficerMember
725,483us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
/ us-gaap_BusinessAcquisitionAxis
= qcrh_M2LeaseFundsLLCMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= qcrh_M2ChiefExecutiveOfficerMember
195,715us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
/ us-gaap_BusinessAcquisitionAxis
= qcrh_M2LeaseFundsLLCMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= qcrh_M2ChiefExecutiveOfficerMember
             
Business Combination, Contingent Consideration, Liability     1,622,832us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BusinessAcquisitionAxis
= qcrh_M2LeaseFundsLLCMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= qcrh_M2ChiefExecutiveOfficerMember
921,198us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BusinessAcquisitionAxis
= qcrh_M2LeaseFundsLLCMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= qcrh_M2ChiefExecutiveOfficerMember
195,715us-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         47,759us-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           3,307,509us-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             199,512us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CoreDepositsMember
199,512us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CoreDepositsMember
       
Finite-Lived Intangible Assets, Amortization Expense, Year Two             199,512us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CoreDepositsMember
199,512us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CoreDepositsMember
       
Finite-Lived Intangible Assets, Amortization Expense, Year Three             199,512us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CoreDepositsMember
199,512us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CoreDepositsMember
       
Finite-Lived Intangible Assets, Amortization Expense, Year Four             199,512us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CoreDepositsMember
199,512us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CoreDepositsMember
       
Finite-Lived Intangible Assets, Amortization Expense, Year Five             199,512us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CoreDepositsMember
199,512us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CoreDepositsMember
       
Finite-Lived Intangible Assets, Amortization Expense, after Year Five             673,361us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CoreDepositsMember
673,361us-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     1,995,127us-gaap_FiniteLivedCoreDepositsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CoreDepositsMember
1,995,127us-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             4,400,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
4,400,000us-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                     10,000,000us-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     10,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
                 
Long-term Line of Credit     0us-gaap_LineOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
0us-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               19,441,834us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
       
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in Shares)               834,715us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
       
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned             13,180,150us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
13,180,150us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
       
Payments to Acquire Businesses, Gross               6,261,684us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
       
Finite-Lived Core Deposits, Gross             3,440,076us-gaap_FiniteLivedCoreDepositsGross
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
3,440,076us-gaap_FiniteLivedCoreDepositsGross
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
       
Certain Loans Acquired in Transfer, Accretable Yield     1,215,398us-gaap_CertainLoansAcquiredInTransferAccretableYield
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
2,068,332us-gaap_CertainLoansAcquiredInTransferAccretableYield
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
    4,128,315us-gaap_CertainLoansAcquiredInTransferAccretableYield
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
4,128,315us-gaap_CertainLoansAcquiredInTransferAccretableYield
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
       
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, Reclassifications to Nonaccretable Difference     98,615us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToNonaccretableDifference
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
233,933us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToNonaccretableDifference
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
    397,894us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToNonaccretableDifference
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
         
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Outstanding Balance             6,702,000us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
6,702,000us-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             4,125,175us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
4,125,175us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
       
Debt Instrument, Unamortized Discount             2,576,825us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
2,576,825us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
       
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other             3,950,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
3,950,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
       
Termination Loans                 10,000,000us-gaap_TerminationLoans
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
     
Term Loan Period                 3 years      
Line of Credit Facility, Remaining Borrowing Capacity     10,000,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
                 
Business Combination, Bargain Purchase, Gain Recognized, Amount       1,841,385us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
               
Business Combination, Acquisition Related Costs       2,353,162us-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             3,033,022us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
3,033,022us-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             2,207,891us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
/ us-gaap_BusinessAcquisitionAxis
= qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
2,207,891us-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   4,501,442us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= qcrh_M2LeaseFundsLLCMember
                   
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned   2,133,417us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned
/ us-gaap_BusinessAcquisitionAxis
= qcrh_M2LeaseFundsLLCMember
              2,133,417us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned
/ us-gaap_BusinessAcquisitionAxis
= qcrh_M2LeaseFundsLLCMember
   
Payments to Acquire Businesses, Gross           1,653,755us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= qcrh_M2LeaseFundsLLCMember
           
Debt Instrument, Unamortized Discount   459,822us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_BusinessAcquisitionAxis
= qcrh_M2LeaseFundsLLCMember
              459,822us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_BusinessAcquisitionAxis
= qcrh_M2LeaseFundsLLCMember
   
Fair Value Inputs, Discount Rate                   5.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_BusinessAcquisitionAxis
= qcrh_M2LeaseFundsLLCMember
   
Accretion Expense     155,716us-gaap_AccretionExpense
/ us-gaap_BusinessAcquisitionAxis
= qcrh_M2LeaseFundsLLCMember
148,137us-gaap_AccretionExpense
/ us-gaap_BusinessAcquisitionAxis
= qcrh_M2LeaseFundsLLCMember
               
Other Liabilities     $ 3,199,298us-gaap_OtherLiabilities
/ us-gaap_BusinessAcquisitionAxis
= qcrh_M2LeaseFundsLLCMember
$ 3,043,582us-gaap_OtherLiabilities
/ us-gaap_BusinessAcquisitionAxis
= qcrh_M2LeaseFundsLLCMember
$ 2,895,445us-gaap_OtherLiabilities
/ us-gaap_BusinessAcquisitionAxis
= qcrh_M2LeaseFundsLLCMember
             
[1] Net cash received at closing totaled $3,025,073