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Note 4 - Loans/Leases Receivable (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Losses On Residual Value $ 0qcrh_LossesOnResidualValue $ 0qcrh_LossesOnResidualValue $ 0qcrh_LossesOnResidualValue
Disposal Group, Including Discontinued Operation, Mortgage Loans 553,000us-gaap_LoansHeldForSaleMortgages 1,358,290us-gaap_LoansHeldForSaleMortgages  
Financing Receivable, Recorded Investment, Nonaccrual Status 18,587,778us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus 17,877,897us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus  
Financing Receivable, Modifications, Recorded Investment 6,434,259us-gaap_FinancingReceivableModificationsRecordedInvestment 13,413,366us-gaap_FinancingReceivableModificationsRecordedInvestment  
Financing Receivable, Modifications, Post-Modification Recorded Investment 1,387,147us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2    
Financing Receivable, Modifications, Subsequent Default, Number of Contracts 0us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1 1us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1  
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down 89,443us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown    
Impaired Financing Receivable, Related Allowance 5,244,673us-gaap_ImpairedFinancingReceivableRelatedAllowance 5,008,822us-gaap_ImpairedFinancingReceivableRelatedAllowance 4,587,769us-gaap_ImpairedFinancingReceivableRelatedAllowance
Threshold for Related Party Loans Evaluated 60,000qcrh_ThresholdForRelatedPartyLoansEvaluated 60,000qcrh_ThresholdForRelatedPartyLoansEvaluated 60,000qcrh_ThresholdForRelatedPartyLoansEvaluated
Troubled Debt Restructurings [Member] | Residential Portfolio Segment [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Financing Receivable, Recorded Investment, Nonaccrual Status 506,283us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_TroubledDebtRestructuringsMember		 446,996us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_TroubledDebtRestructuringsMember		  
Troubled Debt Restructurings [Member] | Commercial and Industrial [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Financing Receivable, Recorded Investment, Nonaccrual Status 1,227,537us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_CommercialAndIndustrialMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_TroubledDebtRestructuringsMember		 77,072us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_CommercialAndIndustrialMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_TroubledDebtRestructuringsMember		  
Troubled Debt Restructurings [Member] | Commercial Real Estate Portfolio Segment [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Financing Receivable, Recorded Investment, Nonaccrual Status 3,214,468us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_TroubledDebtRestructuringsMember		 10,077,501us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_TroubledDebtRestructuringsMember		  
Troubled Debt Restructurings [Member] | Finance Leases Portfolio Segment [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Financing Receivable, Recorded Investment, Nonaccrual Status 61,144us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_TroubledDebtRestructuringsMember		    
Troubled Debt Restructurings [Member] | Consumer Portfolio Segment [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Financing Receivable, Recorded Investment, Nonaccrual Status 3,609us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_TroubledDebtRestructuringsMember		 289,216us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_TroubledDebtRestructuringsMember		  
Troubled Debt Restructurings [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Financing Receivable, Recorded Investment, Nonaccrual Status 5,013,041us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_TroubledDebtRestructuringsMember		 10,890,785us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_TroubledDebtRestructuringsMember		  
Financing Receivable, Modifications, Number of Contracts 10us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_TroubledDebtRestructuringsMember		 19us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_TroubledDebtRestructuringsMember		  
Financing Receivable, Modifications, Post-Modification Recorded Investment 2,024,784us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_TroubledDebtRestructuringsMember		 8,702,765us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_TroubledDebtRestructuringsMember		  
Financing Receivable, Modifications, Pre-Modification Recorded Investment 2,049,463us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_TroubledDebtRestructuringsMember		 8,702,765us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_TroubledDebtRestructuringsMember		  
Restructured and Charged-off [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Financing Receivable, Modifications, Number of Contracts 1us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_RestructuredAndChargedOffMember		    
Nonaccrual [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Financing Receivable, Modifications, Number of Contracts   9us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_NonaccrualMember		  
Financing Receivable, Modifications, Post-Modification Recorded Investment   6,579,346us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_NonaccrualMember		  
Subsequent Default [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Financing Receivable, Modifications, Post-Modification Recorded Investment   61,517us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_SubsequentDefaultMember		  
Impaired Financing Receivable, Related Allowance   0us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_SubsequentDefaultMember		  
Financing Receivable, Modifications, Pre-Modification Recorded Investment   61,517us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= qcrh_SubsequentDefaultMember		  
Residential Portfolio Segment [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Disposal Group, Including Discontinued Operation, Mortgage Loans 553,000us-gaap_LoansHeldForSaleMortgages
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		 1,358,290us-gaap_LoansHeldForSaleMortgages
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		  
Financing Receivable, Recorded Investment, Nonaccrual Status 1,299,545us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		 [1] 1,618,483us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		 [2]  
Financing Receivable, Modifications, Recorded Investment 489,183us-gaap_FinancingReceivableModificationsRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		 371,995us-gaap_FinancingReceivableModificationsRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		  
Impaired Financing Receivable, Related Allowance 151,663us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		 246,266us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		 105,565us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
Commercial and Industrial [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Financing Receivable, Recorded Investment, Nonaccrual Status 7,986,421us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_CommercialAndIndustrialMember		 [1] 1,744,981us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_CommercialAndIndustrialMember		 [2]  
Financing Receivable, Modifications, Recorded Investment 235,926us-gaap_FinancingReceivableModificationsRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_CommercialAndIndustrialMember		 878,381us-gaap_FinancingReceivableModificationsRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_CommercialAndIndustrialMember		  
Impaired Financing Receivable, Related Allowance 3,300,199us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_CommercialAndIndustrialMember		 927,453us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_CommercialAndIndustrialMember		 280,170us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_CommercialAndIndustrialMember
Finance Leases Portfolio Segment [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Financing Receivable, Recorded Investment, Nonaccrual Status 1,105,715us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember		 [1] 894,458us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember		 [2]  
Financing Receivable, Modifications, Recorded Investment 233,557us-gaap_FinancingReceivableModificationsRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember		    
Impaired Financing Receivable, Related Allowance 356,996us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember		 192,847us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember		 125,000us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_FinanceLeasesPortfolioSegmentMember
Consumer Portfolio Segment [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Financing Receivable, Recorded Investment, Nonaccrual Status 645,481us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember		 [1] 975,009us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember		 [2]  
Financing Receivable, Modifications, Recorded Investment 462,552us-gaap_FinancingReceivableModificationsRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember		 367,000us-gaap_FinancingReceivableModificationsRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember		  
Impaired Financing Receivable, Related Allowance 265,795us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember		 467,552us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember		 71,992us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
Nonaccrual [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Financing Receivable, Modifications, Number of Contracts 5us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_NonaccrualMember		    
Non-Owner Occupied Commercial Real Estate [Member] | Line of Credit [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Financing Receivable, Modifications, Recorded Investment   136,000us-gaap_FinancingReceivableModificationsRecordedInvestment
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_NonOwnerOccupiedCommercialRealEstateMember		  
Financing Receivable, Modifications, Number of Contracts   1us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_NonOwnerOccupiedCommercialRealEstateMember		  
Financing Receivable, Modifications, Post-Modification Recorded Investment   135,477us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_NonOwnerOccupiedCommercialRealEstateMember		  
Impaired Financing Receivable, Related Allowance   67,745us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_NonOwnerOccupiedCommercialRealEstateMember		  
Non-Owner Occupied Commercial Real Estate [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Financing Receivable, Recorded Investment, Nonaccrual Status 6,632,038us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_NonOwnerOccupiedCommercialRealEstateMember		 [1] 10,320,491us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_NonOwnerOccupiedCommercialRealEstateMember		 [2]  
Financing Receivable, Modifications, Recorded Investment   905,205us-gaap_FinancingReceivableModificationsRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_NonOwnerOccupiedCommercialRealEstateMember		  
Impaired Financing Receivable, Related Allowance 1,153,471us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_NonOwnerOccupiedCommercialRealEstateMember		 2,603,381us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_NonOwnerOccupiedCommercialRealEstateMember		 2,899,247us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_NonOwnerOccupiedCommercialRealEstateMember
Owner-Occupied Commercial Real Estate [Member] | Line of Credit [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Financing Receivable, Modifications, Recorded Investment   25,000us-gaap_FinancingReceivableModificationsRecordedInvestment
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_OwnerOccupiedCommercialRealEstateMember		  
Financing Receivable, Modifications, Number of Contracts   1us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_OwnerOccupiedCommercialRealEstateMember		  
Financing Receivable, Modifications, Post-Modification Recorded Investment   4,837us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_OwnerOccupiedCommercialRealEstateMember		  
Impaired Financing Receivable, Related Allowance   4,837us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_OwnerOccupiedCommercialRealEstateMember		  
Owner-Occupied Commercial Real Estate [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Financing Receivable, Recorded Investment, Nonaccrual Status 662,566us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_OwnerOccupiedCommercialRealEstateMember		 [1] 1,139,385us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_OwnerOccupiedCommercialRealEstateMember		 [2]  
Impaired Financing Receivable, Related Allowance 4,462us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_OwnerOccupiedCommercialRealEstateMember		 67,498us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= qcrh_OwnerOccupiedCommercialRealEstateMember		  
No Lease End Option Rider [Member]      
Note 4 - Loans/Leases Receivable (Details) [Line Items]      
Number of Leases 27qcrh_NumberOfLeases
/ us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis
= qcrh_NoLeaseEndOptionRiderMember		 33qcrh_NumberOfLeases
/ us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis
= qcrh_NoLeaseEndOptionRiderMember		  
Leveraged Lease Investment $ 1,488,342us-gaap_LeveragedLeaseInvestment
/ us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis
= qcrh_NoLeaseEndOptionRiderMember		 $ 1,694,499us-gaap_LeveragedLeaseInvestment
/ us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis
= qcrh_NoLeaseEndOptionRiderMember		  
[1] At December 31, 2014, nonaccrual loans/leases included $5,013,041 of troubled debt restructurings, including $1,227,537 in commercial and industrial loans, $3,214,468 in commercial real estate loans, $61,144 in direct financing leases, $506,283 in residential real estate loans, and $3,609 in installment loans.
[2] At December 31, 2013, nonaccrual loans/leases included $10,890,785 of troubled debt restructurings, including $77,072 in commercial and industrial loans, $10,077,501 in commercial real estate loans, $446,996 in residential real estate loans, and $289,216 in installment loans.