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Note 4 - Loans/Leases Receivable (Details) - Concentration By Industries (USD $) | Dec. 31, 2014 | Dec. 31, 2013
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Note 4 - Loans/Leases Receivable (Details) - Concentration By Industries [Line Items] |  |
Balance | $ 1,630,003,070 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount | $ 1,460,279,558 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Lessors of Non-Residential Buildings [Member] |  |
Note 4 - Loans/Leases Receivable (Details) - Concentration By Industries [Line Items] |  |
Balance | 256,436,213 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = qcrh_LessorsOfNonResidentialBuildingsMember | 237,049,149 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = qcrh_LessorsOfNonResidentialBuildingsMember
Percentage of Total Loans/Leases | 16.00%qcrh_PercentageOfTotalLoansLeases / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = qcrh_LessorsOfNonResidentialBuildingsMember | 16.00%qcrh_PercentageOfTotalLoansLeases / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = qcrh_LessorsOfNonResidentialBuildingsMember
Lessors of Residential Buildings [Member] |  |
Note 4 - Loans/Leases Receivable (Details) - Concentration By Industries [Line Items] |  |
Balance | 74,667,674 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = qcrh_LessorsOfResidentialBuildingsMember | 69,087,354 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = qcrh_LessorsOfResidentialBuildingsMember
Percentage of Total Loans/Leases | 5.00%qcrh_PercentageOfTotalLoansLeases / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = qcrh_LessorsOfResidentialBuildingsMember | 5.00%qcrh_PercentageOfTotalLoansLeases / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = qcrh_LessorsOfResidentialBuildingsMember
Bank Holding Companies [Member] |  |
Note 4 - Loans/Leases Receivable (Details) - Concentration By Industries [Line Items] |  |
Balance | $ 60,910,570 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = qcrh_BankHoldingCompaniesMember | $ 56,716,875 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = qcrh_BankHoldingCompaniesMember
Percentage of Total Loans/Leases | 4.00%qcrh_PercentageOfTotalLoansLeases / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = qcrh_BankHoldingCompaniesMember | 4.00%qcrh_PercentageOfTotalLoansLeases / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = qcrh_BankHoldingCompaniesMember

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- Definition Percentage of total loans/leases. + References No definition available. + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
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