Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Net income	$ 4,177,889us-gaap_ProfitLoss	$ 3,889,215us-gaap_ProfitLoss
Unrealized gains on securities available for sale:
Unrealized holding gains arising during the period before tax	4,402,337	8,490,174
Less reclassification adjustment for gains included in net income before tax	421,066	20,625
	3,981,271	8,469,549
Unrealized losses on interest rate cap derivatives:
Unrealized holding losses arising during the period before tax	(372,384)
Less reclassification adjustment for ineffectiveness and caplet amortization before tax	901
	(373,285)
Other comprehensive income, before tax	3,607,986	8,469,549
Tax expense	1,387,121us-gaap_OtherComprehensiveIncomeLossTax	3,238,765us-gaap_OtherComprehensiveIncomeLossTax
Other comprehensive income, net of tax	2,220,865	5,230,784
Comprehensive income attributable to QCR Holdings, Inc.	$ 6,398,754	$ 9,119,999

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