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Note 10 - Other Borrowings and Unused Lines of Credit (Details) (USD $) | 1 Months Ended | 0 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2014 | Dec. 31, 2013 | May 13, 2013 | Dec. 31, 2014 | Dec. 31, 2014 | Jun. 27, 2013 | Dec. 31, 2013 | Dec. 31, 2012 | Jun. 26, 2013
Note 10 - Other Borrowings and Unused Lines of Credit (Details) [Line Items] |  |  |  |  |  |  |  |  |
Other Borrowings |  | 142,448,362 us-gaap_OtherBorrowings |  | 150,282,492 us-gaap_OtherBorrowings | 150,282,492 us-gaap_OtherBorrowings |  | 142,448,362 us-gaap_OtherBorrowings |  |
Proceeds from Secured Notes Payable | 10,000,000 us-gaap_ProceedsFromSecuredNotesPayable |  |  |  |  |  |  |  |
Secured Debt [Member] | Community National Bancorporation and Community National Bank [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |  |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 3.17%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember | 3.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |
Secured Debt [Member] | Community National Bancorporation and Community National Bank [Member] |  |  |  |  |  |  |  |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Term |  |  | 3 years |  |  |  |  |  |
Secured Debt [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |  |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 3.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  | 3.23%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |
Secured Debt [Member] |  |  |  |  |  |  |  |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Term | 4 years |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  | 9,800,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  |  |  |  | 9,800,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  |
Long-term Debt |  | 10,800,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  | 17,625,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember | 17,625,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  | 10,800,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  |
Wholesale Repurchase Agreements [Member] |  |  |  |  |  |  |  |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) [Line Items] |  |  |  |  |  |  |  |  |
Other Borrowings |  | 130,000,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsMember |  | 130,000,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsMember | 130,000,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsMember |  | 130,000,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsMember |  |
Security Owned and Pledged as Collateral, Fair Value |  | 151,592,944 us-gaap_SecurityOwnedAndPledgedAsCollateralFairValue / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsMember |  | 153,757,514 us-gaap_SecurityOwnedAndPledgedAsCollateralFairValue / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsMember | 153,757,514 us-gaap_SecurityOwnedAndPledgedAsCollateralFairValue / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsMember |  | 151,592,944 us-gaap_SecurityOwnedAndPledgedAsCollateralFairValue / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsMember |  |
Wholesale Repurchase Agreements With No Put Options [Member] |  |  |  |  |  |  |  |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) [Line Items] |  |  |  |  |  |  |  |  |
Other Borrowings |  |  |  | 55,000,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsWithNoPutOptionsMember | 55,000,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsWithNoPutOptionsMember |  |  |  |
Wholesale Repurchase Agreements Putable in 2015 [Member] |  |  |  |  |  |  |  |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) [Line Items] |  |  |  |  |  |  |  |  |
Other Borrowings |  |  |  | 5,000,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsPutableIn2015Member | 5,000,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsPutableIn2015Member |  |  |  |
Wholesale Repurchase Agreements Putable in 2016 [Member] |  |  |  |  |  |  |  |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) [Line Items] |  |  |  |  |  |  |  |  |
Other Borrowings |  |  |  | 50,000,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsPutableIn2016Member | 50,000,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsPutableIn2016Member |  |  |  |
Wholesale Repurchase Agreements Putable in 2017 [Member] |  |  |  |  |  |  |  |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) [Line Items] |  |  |  |  |  |  |  |  |
Other Borrowings |  |  |  | 20,000,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsPutableIn2017Member | 20,000,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsPutableIn2017Member |  |  |  |
Wholesale Repurchase Agreements Modified in Current Period [Member] |  |  |  |  |  |  |  |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) [Line Items] |  |  |  |  |  |  |  |  |
Other Borrowings |  | 50,000,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsModifiedInCurrentPeriodMember |  |  |  |  | 50,000,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsModifiedInCurrentPeriodMember | 25,000,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsModifiedInCurrentPeriodMember |
Debt Instrument, Interest Rate, Stated Percentage |  | 3.21%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsModifiedInCurrentPeriodMember |  |  |  |  | 3.21%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsModifiedInCurrentPeriodMember | 3.77%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsModifiedInCurrentPeriodMember |
Wholesale Repurchase Agreements Modified In Current Year New Rate [Member] |  |  |  |  |  |  |  |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 2.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsModifiedInCurrentYearNewRateMember |  |  |  |  | 2.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsModifiedInCurrentYearNewRateMember | 3.21%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsModifiedInCurrentYearNewRateMember |
Wholesale Repurchase Agreements With Caps Expiring In Conjunction with Put Options [Member] | Expiring in 2013 [Member] |  |  |  |  |  |  |  |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) [Line Items] |  |  |  |  |  |  |  |  |
Other Borrowings |  |  |  |  |  |  |  | 15,000,000 us-gaap_OtherBorrowings / us-gaap_CreationDateAxis = qcrh_ExpiringIn2013Member / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsWithCapsExpiringInConjunctionWithPutOptionsMember |
Series A Subordinated Notes [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |  |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  | 2.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_DebtInstrumentAxis = qcrh_SeriesASubordinatedNotesMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |
Series A Subordinated Notes [Member] |  |  |  |  |  |  |  |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) [Line Items] |  |  |  |  |  |  |  |  |
Other Borrowings |  | 2,648,362 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_SeriesASubordinatedNotesMember |  | 2,657,492 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_SeriesASubordinatedNotesMember | 2,657,492 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_SeriesASubordinatedNotesMember |  | 2,648,362 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_SeriesASubordinatedNotesMember |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 6.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = qcrh_SeriesASubordinatedNotesMember | 6.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = qcrh_SeriesASubordinatedNotesMember |  |  |  |
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed |  |  |  |  | 100.00%us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed / us-gaap_DebtInstrumentAxis = qcrh_SeriesASubordinatedNotesMember |  |  |  |
Revolving Credit Facility [Member] | Community National Bancorporation and Community National Bank [Member] |  |  |  |  |  |  |  |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  | 2.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |
Line of Credit Facility, Current Borrowing Capacity |  |  | 4,400,000 us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |  |  |
Long-term Line of Credit |  |  |  |  |  |  |  |  | 10,000,000 us-gaap_LineOfCredit / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) [Line Items] |  |  |  |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity |  |  |  | 10,000,000 us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember | 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 | 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 10 - Other Borrowings and Unused Lines of Credit (Details) [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  | 3.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember | 3.17%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_BusinessAcquisitionAxis = qcrh_CommunityNationalBancorporationAndCommunityNationalBankMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |

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- Definition Period of time between issuance and maturity of debt instrument, 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 Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 6: 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 The carrying amount as of the balance sheet date for the aggregate of other miscellaneous borrowings owed by the reporting entity. + 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 210.9-03.13,16) -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 03 -Paragraph 13, 16 -Article 9 + Details
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