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Note 13 - Federal and State Income Taxes (Details) - The Change in Deferred Income Taxes (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Note 13 - Federal and State Income Taxes (Details) - The Change in Deferred Income Taxes [Line Items] |  |  |
Provision for income taxes | $ (1,165,009)us-gaap_DeferredIncomeTaxExpenseBenefit | $ (1,021,991)us-gaap_DeferredIncomeTaxExpenseBenefit | $ 2,302,418 us-gaap_DeferredIncomeTaxExpenseBenefit
Statement of stockholders' equity- accumulated other comprehensive income (loss), unrealized gains (losses) on securities available for sale, net, and unrealized losses on derivative instruments | 7,281,574 us-gaap_OtherComprehensiveIncomeLossTax | (11,373,902)us-gaap_OtherComprehensiveIncomeLossTax | (35,008)us-gaap_OtherComprehensiveIncomeLossTax
| 1,165,009 us-gaap_IncreaseDecreaseInDeferredIncomeTaxes | 1,021,991 us-gaap_IncreaseDecreaseInDeferredIncomeTaxes | (2,302,418)us-gaap_IncreaseDecreaseInDeferredIncomeTaxes
As Reflected in Consolidated Financial Statements [Member] |  |  |
Note 13 - Federal and State Income Taxes (Details) - The Change in Deferred Income Taxes [Line Items] |  |  |
| $ 6,116,565 us-gaap_IncreaseDecreaseInDeferredIncomeTaxes / us-gaap_IncomeTaxAuthorityAxis = qcrh_AsReflectedInConsolidatedFinancialStatementsMember | $ (12,395,893)us-gaap_IncreaseDecreaseInDeferredIncomeTaxes / us-gaap_IncomeTaxAuthorityAxis = qcrh_AsReflectedInConsolidatedFinancialStatementsMember | $ 2,267,410 us-gaap_IncreaseDecreaseInDeferredIncomeTaxes / us-gaap_IncomeTaxAuthorityAxis = qcrh_AsReflectedInConsolidatedFinancialStatementsMember

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- Definition Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.7) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: 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.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Deferred Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6510177 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition The increase (decrease) during the reporting period in the account that represents the temporary difference that results from Income or Loss that is recognized for accounting purposes but not for tax purposes and vice versa. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition Amount of tax expense (benefit) allocated to other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 11 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=18498875&loc=d3e39076-109324 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e640-108580 + Details
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