Note 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)	9 Months Ended
Sep. 30, 2024 subsidiary
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Number of subsidiaries commercial banks	4
Maximum term for financial receivable	1 year

Represents the maximum term for financial receivable, lines of credit.

No definition available.

Name:	qcrh_FinancingReceivableLinesOfCreditMaximumTerm
Namespace Prefix:	qcrh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration