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Note 15 - Stock-Based Compensation (Details) - Stock-based Compensation Expense (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 891,619us-gaap_AllocatedShareBasedCompensationExpense $ 792,279us-gaap_AllocatedShareBasedCompensationExpense $ 849,760us-gaap_AllocatedShareBasedCompensationExpense
Stock Option and Incentive Plans [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense 832,845us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= qcrh_StockOptionAndIncentivePlansMember		 734,827us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= qcrh_StockOptionAndIncentivePlansMember		 798,929us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= qcrh_StockOptionAndIncentivePlansMember
Employee Stock Purchase Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 58,774us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= qcrh_EmployeeStockPurchasePlanMember		 $ 57,452us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= qcrh_EmployeeStockPurchasePlanMember		 $ 50,831us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= qcrh_EmployeeStockPurchasePlanMember