Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Interest and dividend income:
Loans/leases, including fees	$ 16,868,806	$ 16,369,605	$ 33,644,396	$ 31,458,432
Securities:
Taxable	2,573,649	2,629,832	5,156,443	5,090,281
Nontaxable	1,448,415	944,100	2,902,471	1,746,573
Interest-bearing deposits at financial institutions	71,243	61,724	161,770	121,478
Restricted investment securities	139,570	131,151	268,495	256,256
Federal funds sold	3,693	2,989	7,012	3,863
Total interest and dividend income	21,105,376	20,139,401	42,140,587	38,676,883
Interest expense:
Deposits	1,101,615	1,176,855	2,203,208	2,293,646
Short-term borrowings	60,811	103,435	112,507	167,702
Federal Home Loan Bank advances	1,495,980	1,726,622	3,051,956	3,459,434
Other borrowings	1,174,594	1,162,893	2,346,125	2,353,648
Junior subordinated debentures	307,033	261,544	612,207	503,084
Total interest expense	4,140,033	4,431,349	8,326,003	8,777,514
Net interest income	16,965,343	15,708,052	33,814,584	29,899,369
Provision for loan/lease losses	1,001,879	1,520,137	2,096,041	2,577,919
Net interest income after provision for loan/lease losses	15,963,464	14,187,915	31,718,543	27,321,450
Noninterest income:
Trust department fees	1,444,414	1,197,181	2,944,756	2,236,851
Investment advisory and management fees	710,858	695,094	1,359,850	1,304,435
Deposit service fees	1,091,923	1,054,223	2,137,808	1,962,046
Gains on sales of residential real estate loans	132,971	246,621	196,458	537,772
Gains on sales government guaranteed portions of loans	508,168	765,738	702,187	1,610,962
Securities gains	571	16,460	21,196	16,460
Earnings on bank-owned life insurance	388,672	423,883	842,836	862,570
Bargain purchase gain on Community National Acquisition		1,841,385		1,841,385
Losses on other real estate owned, net	(126,657)	(83,339)	(144,705)	(529,969)
Other	1,193,293	791,510	2,030,668	2,310,273
Total noninterest income	5,344,213	6,948,756	10,091,054	12,152,785
Noninterest expense:
Salaries and employee benefits	9,922,191	9,186,233	19,940,109	17,928,916
Occupancy and equipment expense	1,838,971	1,586,841	3,733,259	3,015,711
Professional and data processing fees	1,403,915	1,438,753	2,988,321	2,578,814
FDIC and other insurance	695,365	627,390	1,410,115	1,183,301
Loan/lease expense	377,492	251,868	723,128	496,959
Advertising and marketing	501,548	412,041	839,135	676,609
Postage and telephone	258,121	257,611	548,796	476,302
Stationery and supplies	145,635	150,718	297,386	261,388
Bank service charges	324,397	284,345	622,429	559,840
Acquisition and data conversion costs		432,326		788,904
Other	638,894	606,223	1,144,271	1,226,105
Total noninterest expense	16,106,529	15,234,349	32,246,949	29,192,849
Net income before income taxes	5,201,148	5,902,322	9,562,648	10,281,386
Federal and state income tax expense	1,193,312	1,857,091	1,665,597	2,971,011
Net income	4,007,836	4,045,231	7,897,051	7,310,375
Less: Preferred stock dividends	373,869	810,838	1,081,877	1,621,675
Net income attributable to QCR Holdings, Inc. common stockholders	$ 3,633,967	$ 3,234,393	$ 6,815,174	$ 5,688,700
Earnings per common share attributable to QCR Holdings, Inc. common shareholders
Basic (in Dollars per share)	$ 0.46	$ 0.60	$ 0.86	$ 1.10
Diluted (in Dollars per share)	$ 0.45	$ 0.59	$ 0.85	$ 1.08
Weighted average common shares outstanding (in Shares)	7,924,624	5,393,062	7,912,830	5,160,327
Weighted average common and common equivalent shares outstanding (in Shares)	8,050,514	5,497,275	8,040,279	5,265,809
Cash dividends declared per common share (in Dollars per share)	$ 0.04	$ 0.04	$ 0.04	$ 0.04