Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Interest and dividend income:
Loans/leases, including fees	$ 18,004,519	$ 16,775,590
Securities:
Taxable	1,942,765	2,582,794
Nontaxable	1,730,568	1,454,056
Interest-bearing deposits at financial institutions	77,054	90,527
Restricted investment securities	142,318	128,925
Federal funds sold	4,506	3,319
Total interest and dividend income	21,901,730	21,035,211
Interest expense:
Deposits	1,072,445	1,101,593
Short-term borrowings	64,025	51,696
Federal Home Loan Bank advances	1,443,715	1,555,976
Other borrowings	1,231,886	1,171,531
Junior subordinated debentures	307,442	305,174
Total interest expense	4,119,513	4,185,970
Net interest income	17,782,217	16,849,241
Provision for loan/lease losses	1,710,456	1,094,162
Net interest income after provision for loan/lease losses	16,071,761	15,755,079
Noninterest income:
Trust department fees	1,633,395	1,500,342
Investment advisory and management fees	710,043	648,992
Deposit service fees	1,116,983	1,045,885
Gains on sales of residential real estate loans	86,140	63,487
Gains on sales government guaranteed portions of loans	70,973	194,019
Securities gains	421,066	20,625
Earnings on bank-owned life insurance	478,739	454,164
Swap fee income	726,207	62,000
Debit card fees	238,000	230,605
Correspondent banking fees	319,621	232,143
Participation service fees on commercial loan participations	221,949	206,194
Losses on other real estate owned, net	(28,953)	(18,048)
Other	255,778	106,433
Total noninterest income	6,249,941	4,746,841
Noninterest expense:
Salaries and employee benefits	11,034,452	10,017,918
Occupancy and equipment expense	1,794,171	1,894,288
Professional and data processing fees	1,470,517	1,584,406
FDIC and other insurance	719,057	714,750
Loan/lease expense	466,613	345,636
Advertising and marketing	418,237	337,587
Postage and telephone	248,956	290,675
Stationery and supplies	142,555	151,751
Bank service charges	337,458	298,032
Other	600,308	505,377
Total noninterest expense	17,232,324	16,140,420
Net income before income taxes	5,089,378	4,361,500
Federal and state income tax expense	911,489	472,285
Net income	4,177,889	3,889,215
Less: Preferred stock dividends		708,008
Net income attributable to QCR Holdings, Inc. common stockholders	$ 4,177,889	$ 3,181,207
Earnings per common share attributable to QCR Holdings, Inc. common shareholders
Basic (in Dollars per share)	$ 0.52	$ 0.40
Diluted (in Dollars per share)	$ 0.52	$ 0.40
Weighted average common shares outstanding (in Shares)	7,975,910	7,901,035
Weighted average common and common equivalent shares outstanding (in Shares)	8,097,444	8,030,043