Consolidated Statements of Comprehensive Income (Loss) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net income	$ 14,952,537	$ 14,938,245	$ 13,106,240
Unrealized gains (losses) on securities available for sale:
Unrealized holding gains (losses) arising during the period before tax	19,697,118	(29,292,079)	(40,839)
Less reclassification adjustment for gains included in net income before tax	92,363	432,492	42,200
	19,604,755	(29,724,571)	(83,039)
Unrealized losses on interest rate cap derivatives:
Unrealized holding losses arising during the period before tax	(584,264)
Less reclassification adjustment for ineffectiveness and caplet amortization before tax	(30,147)
	(614,411)
Other comprehensive income (loss), before tax	18,990,344	(29,724,571)	(83,039)
Tax expense (benefit)	7,281,574	(11,373,902)	(35,008)
Other comprehensive income (loss), net of tax	11,708,770	(18,350,669)	(48,031)
Comprehensive income (loss) attributable to QCR Holdings, Inc.	$ 26,661,307	$ (3,412,424)	$ 13,058,209