Note 8 - Regulatory Capital Requirements and Restrictions on Dividends (Details) $ in Millions	Aug. 27, 2015 USD ($)
Disclosure Text Block [Abstract]
Shelf Registration, Maximum Value of Equity Authorized for Issuance	$ 100.0

The value of company equity authorized for issuance filed under a universal shelf registration statement.

No definition available.

Name:	qcrh_ShelfRegistrationMaximumValueOfEquityAuthorizedForIssuance
Namespace Prefix:	qcrh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant