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

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- Definition Pre-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953676-111524 + Details
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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953682-111524 + Details
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- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5111-111524 + Details
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