Note 2 - Community National Bancorporation and Community National Bank (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure Text Block Supplement [Abstract]

Core Deposit [Table Text Block]

	2015			2014
Balance, beginning	$	1,670,921		$	1,870,433
Amortization expense		(199,512	)		(199,512	)
Balance, ending	$	1,471,409		$	1,670,921

	2015			2014
Gross carrying amount	$	1,995,127		$	1,995,127
Accumulated amortization		(523,718	)		(324,206	)
Net carrying amount	$	1,471,409		$	1,670,921

Schedule of Business Acquisitions, by Acquisition [Table Text Block]

	As of May 13, 2013
ASSETS
Cash and due from banks	$	9,286,757
Federal funds sold		12,335,000
Interest-bearing deposits at financial institutions		2,024,539
Securities available for sale		45,853,826
Loans/leases receivable, net		195,658,486
Premises and equipment		8,132,021
Core deposit intangible		3,440,076
Bank-owned life insurance		4,595,529
Restricted investment securities		1,259,375
Other real estate owned		550,326
Other assets		5,178,583
Total assets acquired	$	288,314,518
LIABILITIES
Deposits	$	255,045,071
Other borrowings		3,950,000
Junior subordinated debentures		4,125,175
Other liabilities		3,911,053
Total liabilities assumed	$	267,031,299
Net assets acquired	$	21,283,219
CONSIDERATION PAID:
Cash	$	6,261,684
Issuance of 834,715 shares of common stock		13,180,150
Total consideration paid	$	19,441,834
Bargain purchase gain	$	1,841,385

Business Acquisition, Pro Forma Information [Table Text Block]

	Year ended December 31,
	2013
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	$	1.47
Diluted	$	1.44

Disposal Groups, Including Discontinued Operations [Table Text Block]

ASSETS	As of October 4, 2013
Cash	$	29,905,991
Loans receivable		22,709,735
Premises and equipment		776,782
Core deposit intangible		910,415
Other assets		68,456
Total assets sold	$	54,371,379
LIABILITIES
Deposits	$	55,191,930
Other liabilities		53,421
Total liabilities sold	$	55,245,351
Gain on sale, pre-tax	$	873,972

ASSETS	As of October 11, 2013
Cash	$	519,627
Loans receivable		31,749,135
Premises and equipment		1,597,040
Core deposit intangible		480,347
Other assets		70,443
Total assets sold	$	34,416,592
LIABILITIES
Deposits	$	35,830,168
Other liabilities		46,668
Total liabilities sold	$	35,876,836
Gain on sale, pre-tax	$	1,460,244