Note 4 - Earnings Per Share (Details) - Earnings Per Share - Basic and Diluted (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share - Basic and Diluted [Abstract]
Net income	$ 3,889,215	$ 3,265,144
Less: Preferred stock dividends	708,008	810,837
Net income attributable to QCR Holdings, Inc. common stockholders	$ 3,181,207	$ 2,454,307
Earnings per common share attributable to QCR Holdings, Inc. common stockholders
Basic	$ 0.40	$ 0.50
Diluted	$ 0.40	$ 0.49
Weighted average common shares outstanding	7,901,035	4,927,591
Weighted average common shares issuable upon exercise of stock options and under the employee stock purchase plan	129,008	106,751
Weighted average common and common equivalent shares outstanding	8,030,043	5,034,342