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Note 6 - Derivatives and Hedging Activities (Details) - Summary of Interest Rate Cap Derivatives (Cash Flow Hedging [Member], USD $) In Millions, unless otherwise specified | Dec. 31, 2014
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Interest Rate Cap 1 [Member] | Other Assets [Member] |
Derivatives, Fair Value [Line Items] |
Notional amount | $ 15,000,000 invest_DerivativeNotionalAmount / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherAssetsMember / us-gaap_DerivativeInstrumentRiskAxis = qcrh_InterestRateCap1Member / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember
Fair value | 608,189 us-gaap_InterestRateCashFlowHedgeAssetAtFairValue / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherAssetsMember / us-gaap_DerivativeInstrumentRiskAxis = qcrh_InterestRateCap1Member / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember
Interest Rate Cap 2 [Member] | Other Assets [Member] |
Derivatives, Fair Value [Line Items] |
Notional amount | 15,000,000 invest_DerivativeNotionalAmount / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherAssetsMember / us-gaap_DerivativeInstrumentRiskAxis = qcrh_InterestRateCap2Member / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember
Fair value | 879,197 us-gaap_InterestRateCashFlowHedgeAssetAtFairValue / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherAssetsMember / us-gaap_DerivativeInstrumentRiskAxis = qcrh_InterestRateCap2Member / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember
Interest Rate Cap [Member] |
Derivatives, Fair Value [Line Items] |
Notional amount | 30,000,000 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateCapMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember
Fair value | $ 1,487,386 us-gaap_InterestRateCashFlowHedgeAssetAtFairValue / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateCapMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_DerivativesFairValueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Fair value as of the balance sheet date of all interest rate derivative assets designated as cash flow hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959 + Details
Name: | us-gaap_InterestRateCashFlowHedgeAssetAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant