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Note 14 - Employee Benefit Plans (Details) - Profit Sharing Contributions (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Profit Sharing Contributions [Abstract] |  |  |
Matching contribution | $ 1,179,979 qcrh_DefinedContributionPlanMatchingContribution | $ 1,129,726 qcrh_DefinedContributionPlanMatchingContribution | $ 1,014,418 qcrh_DefinedContributionPlanMatchingContribution
Discretionary contribution | 198,800 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount | 186,000 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount | 188,700 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
| $ 1,378,779 us-gaap_PensionContributions | $ 1,315,726 us-gaap_PensionContributions | $ 1,203,118 us-gaap_PensionContributions

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- Definition Defined contribution plan matching contribution. + References No definition available. + Details
Name: | qcrh_DefinedContributionPlanMatchingContribution
Namespace Prefix: | qcrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | qcrh_ProfitSharingContributionsAbstract
Namespace Prefix: | qcrh_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of cash or cash equivalents contributed by the entity to fund its pension plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
Name: | us-gaap_PensionContributions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration