Note 18 - Quarterly Results of Operations (Unaudited) (Details) - Quarterly Results of Operations (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Note 18 - Quarterly Results of Operations (Unaudited) (Details) - Quarterly Results of Operations [Line Items]
Total interest expense	$ 17,766,521	$ 19,726,613	$ 23,578,392
Net interest income	64,105,437	57,649,260	54,144,856
Provision for loan/lease losses	5,930,420	4,370,767	6,616,014
Noninterest income	25,813,828	16,621,295	17,461,878
Noninterest expense	64,432,658	52,258,947	50,992,652
Income before taxes	19,556,187	17,640,841	13,998,068
Federal and state income tax expense	4,617,942	4,534,601	3,868,199
Net income	14,938,245	13,106,240	10,129,869
Less net income attributable to noncontrolling interests		488,473	438,221
Net income attributable to QCR Holdings, Inc.	14,938,245	12,617,767	9,691,648
Earnings per common share:
Basic (in Dollars per share)	$ 2.13	$ 1.88	$ 0.93
Diluted (in Dollars per share)	$ 2.08	$ 1.85	$ 0.92
First Quarter [Member]
Note 18 - Quarterly Results of Operations (Unaudited) (Details) - Quarterly Results of Operations [Line Items]
Total interest income	18,537,482	19,373,804
Total interest expense	4,346,165	5,170,351
Net interest income	14,191,317	14,203,453
Provision for loan/lease losses	1,057,782	780,446
Noninterest income	5,204,029	3,956,878
Noninterest expense	13,958,500	12,738,080
Income before taxes	4,379,064	4,641,805
Federal and state income tax expense	1,113,920	1,238,956
Net income		3,402,849
Less net income attributable to noncontrolling interests		166,031
Net income attributable to QCR Holdings, Inc.	3,265,144	3,236,818
Earnings per common share:
Basic (in Dollars per share)	$ 0.50	$ 0.48
Diluted (in Dollars per share)	$ 0.49	$ 0.48
Second Quarter [Member]
Note 18 - Quarterly Results of Operations (Unaudited) (Details) - Quarterly Results of Operations [Line Items]
Total interest income	20,139,401	19,534,528
Total interest expense	4,431,349	5,019,035
Net interest income	15,708,052	14,515,493
Provision for loan/lease losses	1,520,137	1,048,469
Noninterest income	6,948,756	4,067,509
Noninterest expense	15,234,349	13,109,083
Income before taxes	5,902,322	4,425,450
Federal and state income tax expense	1,857,091	1,152,071
Net income		3,273,379
Less net income attributable to noncontrolling interests		201,223
Net income attributable to QCR Holdings, Inc.	4,045,231	3,072,156
Earnings per common share:
Basic (in Dollars per share)	$ 0.60	$ 0.44
Diluted (in Dollars per share)	$ 0.59	$ 0.44
Third Quarter [Member]
Note 18 - Quarterly Results of Operations (Unaudited) (Details) - Quarterly Results of Operations [Line Items]
Total interest income	21,996,243	19,487,525
Total interest expense	4,685,907	4,858,007
Net interest income	17,310,336	14,629,518
Provision for loan/lease losses	1,366,984	1,496,194
Noninterest income	5,934,653	4,117,182
Noninterest expense	17,027,268	13,031,517
Income before taxes	4,850,737	4,218,989
Federal and state income tax expense	1,038,793	1,034,479
Net income		3,184,510
Less net income attributable to noncontrolling interests		127,177
Net income attributable to QCR Holdings, Inc.	3,811,944	3,057,333
Earnings per common share:
Basic (in Dollars per share)	$ 0.52	$ 0.45
Diluted (in Dollars per share)	$ 0.51	$ 0.44
Fourth Quarter [Member]
Note 18 - Quarterly Results of Operations (Unaudited) (Details) - Quarterly Results of Operations [Line Items]
Total interest income	21,198,832	18,980,016
Total interest expense	4,303,100	4,679,220
Net interest income	16,895,732	14,300,796
Provision for loan/lease losses	1,985,517	1,045,658
Noninterest income	7,726,390	4,479,726
Noninterest expense	18,212,541	13,380,267
Income before taxes	4,424,064	4,354,597
Federal and state income tax expense	608,138	1,109,095
Net income		3,245,502
Less net income attributable to noncontrolling interests		(5,958)
Net income attributable to QCR Holdings, Inc.	$ 3,815,926	$ 3,251,460
Earnings per common share:
Basic (in Dollars per share)	$ 0.51	$ 0.50
Diluted (in Dollars per share)	$ 0.50	$ 0.49