Note 3 - LOANS LEASES RECEIVABLE - Troubled Debt Restructurings (Details) - item	Mar. 31, 2022	Mar. 31, 2021
LOANS/LEASES RECEIVABLE
Number of loans restructured	0	0

The number of loans restructured during the period.

No definition available.

Name:	qcrh_NumberOfLoansRestructured
Namespace Prefix:	qcrh_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant