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Note 8 - Short-Term Borrowings (Details) - Overnight Repurchase Agreements (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Securities underlying the agreements as of end of period: |  |
Carrying value | $ 165,360,426 us-gaap_SecuritiesSoldUnderAgreementsToRepurchase | $ 143,262,002 us-gaap_SecuritiesSoldUnderAgreementsToRepurchase
Fair value | 165,360,426 us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure | 143,262,002 us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure
Repurchase Agreements With Customers [Member] |  |
Note 8 - Short-Term Borrowings (Details) - Overnight Repurchase Agreements [Line Items] |  |
Average daily balance during the period | 128,818,152 qcrh_AverageDailyBalanceDuringThePeriod / us-gaap_DebtInstrumentAxis = qcrh_RepurchaseAgreementsWithCustomersMember | 123,543,416 qcrh_AverageDailyBalanceDuringThePeriod / us-gaap_DebtInstrumentAxis = qcrh_RepurchaseAgreementsWithCustomersMember
Average daily interest rate during the period | 0.12%qcrh_AverageDailyInterestRateDuringThePeriod / us-gaap_DebtInstrumentAxis = qcrh_RepurchaseAgreementsWithCustomersMember | 0.12%qcrh_AverageDailyInterestRateDuringThePeriod / us-gaap_DebtInstrumentAxis = qcrh_RepurchaseAgreementsWithCustomersMember
Maximum month-end balance during the period | 147,623,624 qcrh_MaximumMonthEndBalanceDuringThePeriod / us-gaap_DebtInstrumentAxis = qcrh_RepurchaseAgreementsWithCustomersMember | 146,075,177 qcrh_MaximumMonthEndBalanceDuringThePeriod / us-gaap_DebtInstrumentAxis = qcrh_RepurchaseAgreementsWithCustomersMember
Weighted average rate as of end of period | 0.13%qcrh_WeightedAverageRateAsOfEndOfPeriod / us-gaap_DebtInstrumentAxis = qcrh_RepurchaseAgreementsWithCustomersMember | 0.13%qcrh_WeightedAverageRateAsOfEndOfPeriod / us-gaap_DebtInstrumentAxis = qcrh_RepurchaseAgreementsWithCustomersMember
Federal Funds Purchased [Member] |  |
Note 8 - Short-Term Borrowings (Details) - Overnight Repurchase Agreements [Line Items] |  |
Average daily balance during the period | 33,876,815 qcrh_AverageDailyBalanceDuringThePeriod / us-gaap_DebtInstrumentAxis = qcrh_FederalFundsPurchased1Member | 41,156,729 qcrh_AverageDailyBalanceDuringThePeriod / us-gaap_DebtInstrumentAxis = qcrh_FederalFundsPurchased1Member
Average daily interest rate during the period | 0.40%qcrh_AverageDailyInterestRateDuringThePeriod / us-gaap_DebtInstrumentAxis = qcrh_FederalFundsPurchased1Member | 0.40%qcrh_AverageDailyInterestRateDuringThePeriod / us-gaap_DebtInstrumentAxis = qcrh_FederalFundsPurchased1Member
Maximum month-end balance during the period | $ 131,100,000 qcrh_MaximumMonthEndBalanceDuringThePeriod / us-gaap_DebtInstrumentAxis = qcrh_FederalFundsPurchased1Member | $ 95,380,000 qcrh_MaximumMonthEndBalanceDuringThePeriod / us-gaap_DebtInstrumentAxis = qcrh_FederalFundsPurchased1Member
Weighted average rate as of end of period | 0.23%qcrh_WeightedAverageRateAsOfEndOfPeriod / us-gaap_DebtInstrumentAxis = qcrh_FederalFundsPurchased1Member | 0.28%qcrh_WeightedAverageRateAsOfEndOfPeriod / us-gaap_DebtInstrumentAxis = qcrh_FederalFundsPurchased1Member

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- Definition Fair value portion of securities that an entity sells and agrees to repurchase at a specified date for a specified price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611 + Details
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- Definition Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + 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(1)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226008-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Subparagraph 1 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=45278096&loc=d3e9760-107771 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(a)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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