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Note 13 - Federal and State Income Taxes (Details) - The Change in Deferred Income Taxes (USD $)
 12 Months Ended
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 $ 2,302,418us-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 7,281,574us-gaap_OtherComprehensiveIncomeLossTax (11,373,902)us-gaap_OtherComprehensiveIncomeLossTax (35,008)us-gaap_OtherComprehensiveIncomeLossTax
1,165,009us-gaap_IncreaseDecreaseInDeferredIncomeTaxes 1,021,991us-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]      
$ 6,116,565us-gaap_IncreaseDecreaseInDeferredIncomeTaxes
/ us-gaap_IncomeTaxAuthorityAxis
= qcrh_AsReflectedInConsolidatedFinancialStatementsMember		 $ (12,395,893)us-gaap_IncreaseDecreaseInDeferredIncomeTaxes
/ us-gaap_IncomeTaxAuthorityAxis
= qcrh_AsReflectedInConsolidatedFinancialStatementsMember		 $ 2,267,410us-gaap_IncreaseDecreaseInDeferredIncomeTaxes
/ us-gaap_IncomeTaxAuthorityAxis
= qcrh_AsReflectedInConsolidatedFinancialStatementsMember