Note 5 - Junior Subordinated Debentures (Details) - Junior Subordinated Debentures (USD $)	Jun. 30, 2013	Dec. 31, 2012
Note 5 - Junior Subordinated Debentures (Details) - Junior Subordinated Debentures [Line Items]
Note Payable	$ 40,210,175	$ 36,085,000
Market Value Discount per ASC 805	(2,576,825)
QCR Holdings Capital Trust II [Member]
Note 5 - Junior Subordinated Debentures (Details) - Junior Subordinated Debentures [Line Items]
Note Payable	12,372,000	12,372,000
QCR Holdings Capital Trust III [Member]
Note 5 - Junior Subordinated Debentures (Details) - Junior Subordinated Debentures [Line Items]
Note Payable	8,248,000	8,248,000
QCR Holdings Capital Trust IV [Member]
Note 5 - Junior Subordinated Debentures (Details) - Junior Subordinated Debentures [Line Items]
Note Payable	5,155,000	5,155,000
QCR Holdings Capital Trust V [Member]
Note 5 - Junior Subordinated Debentures (Details) - Junior Subordinated Debentures [Line Items]
Note Payable	10,310,000	10,310,000
Community National Trust II [Member]
Note 5 - Junior Subordinated Debentures (Details) - Junior Subordinated Debentures [Line Items]
Note Payable	3,093,000
Community National Trust III [Member]
Note 5 - Junior Subordinated Debentures (Details) - Junior Subordinated Debentures [Line Items]
Note Payable	$ 3,609,000