Note 2 - Community National Bancorporation and Community National Bank (Details) - Pro Forma Combined Operating Results	12 Months Ended
	Dec. 31, 2013 USD ($) $ / shares
Pro Forma Combined Operating Results [Abstract]
Interest income	$ 83,008,255
Noninterest income	22,042,194
Net income	11,320,890
Net income attributable to QCR Holdings, Inc. common stockholders	$ 8,152,588
Earnings per common share attributable to QCR Holdings, Inc. common stockholders
Basic (in Dollars per share) | $ / shares	$ 1.47
Diluted (in Dollars per share) | $ / shares	$ 1.44