Consolidated Statements of Income (Unaudited) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest and dividend income:
Loans/leases, including fees		$ 19,278,335	$ 17,735,190	$ 55,528,578	$ 51,379,586
Securities:
Taxable		1,639,534	2,327,836	5,317,794	7,484,279
Nontaxable		2,021,804	1,531,534	5,642,692	4,434,005
Interest-bearing deposits at financial institutions		66,604	66,397	208,323	228,167
Restricted investment securities		127,172	128,153	377,651	396,648
Federal funds sold		7,663	7,532	18,416	14,544
Total interest and dividend income		23,141,112	21,796,642	67,093,454	63,937,229
Interest expense:
Deposits		1,140,419	1,168,385	3,296,351	3,371,593
Short-term borrowings		63,815	64,665	181,084	177,172
Federal Home Loan Bank advances		537,473	1,497,456	2,982,834	4,549,412
Other borrowings		944,903	1,279,626	3,285,231	3,625,751
Junior subordinated debentures		316,976	311,179	937,375	923,386
Total interest expense		3,003,586	4,321,311	10,682,875	12,647,314
Net interest income		20,137,526	17,475,331	56,410,579	51,289,915
Provision for loan/lease losses		1,635,263	1,063,323	5,694,384	3,159,364
Net interest income after provision for loan/lease losses		18,502,263	16,412,008	50,716,195	48,130,551
Noninterest income:
Trust department fees		1,531,964	1,355,700	4,676,535	4,300,456
Investment advisory and management fees		782,442	726,908	2,250,918	2,086,758
Deposit service fees		1,186,701	1,168,961	3,404,550	3,306,769
Gains on sales of residential real estate loans		84,609	120,627	266,284	317,085
Gains on sales of government guaranteed portions of loans		759,668	158,736	899,987	860,923
Securities gains, net		56,580	19,429	473,513	40,625
Earnings on bank-owned life insurance		407,018	434,065	1,318,909	1,276,901
Swap fee income		62,700		1,182,630	62,000
Debit card fees		289,500	251,600	782,500	763,005
Correspondent banking fees		310,759	295,147	915,759	745,794
Participation service fees on commercial loan participations		201,822	218,268	647,598	632,469
Gains (losses) on other real estate owned, net		1,134,093	30,596	1,204,016	(114,109)
Other		841,070	381,636	1,603,175	1,063,222
Total noninterest income		7,648,926	5,161,673	19,626,374	15,341,898
Noninterest expense:
Salaries and employee benefits		10,583,361	10,358,783	32,709,765	30,298,892
Occupancy and equipment expense		1,863,648	1,798,030	5,507,533	5,515,448
Professional and data processing fees		1,742,268	1,530,139	4,683,480	4,518,460
FDIC and other insurance		702,136	711,792	2,151,756	2,121,907
Loan/lease expense		252,860	184,908	1,087,747	908,036
Advertising and marketing		460,411	555,076	1,368,152	1,394,211
Postage and telephone		220,895	146,759	683,993	695,555
Stationery and supplies		144,967	138,377	424,330	435,763
Bank service charges		392,352	337,067	1,088,806	959,496
Losses on debt extinguishment				6,894,185
Other		830,433	721,209	2,193,815	1,970,492
Total noninterest expense		17,193,331	16,482,140	58,793,562	48,818,260
Net income before income taxes		8,957,858	5,091,541	11,549,007	14,654,189
Federal and state income tax expense		2,468,871	1,028,876	1,405,949	2,694,473
Net income		6,488,987	4,062,665	10,143,058	11,959,716
Less: Preferred stock dividends					1,081,877
Net income attributable to QCR Holdings, Inc. common stockholders		$ 6,488,987	$ 4,062,665	$ 10,143,058	$ 10,877,839
Earnings per common share attributable to QCR Holdings, Inc. common shareholders
Basic (in Dollars per share)		$ 0.55	$ 0.51	$ 1.03	$ 1.37
Diluted (in Dollars per share)		$ 0.55	$ 0.50	$ 1.01	$ 1.35
Weighted average common shares outstanding (in Shares)	[1]	11,713,993	7,931,944	9,878,882	7,919,201
Weighted average common and common equivalent shares outstanding (in Shares)		11,875,930	8,053,985	10,024,441	8,040,418
Cash dividends declared per common share (in Dollars per share)				$ 0.04	$ 0.04

[1] The increase in weighted average common shares outstanding was primarily due to the common stock issuance discussed in Note 7 to the Consolidated Financial Statements.