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Note 9 - BUSINESS SEGMENT INFORMATION (Details)	Mar. 31, 2025 subsidiary
Number of subsidiaries commercial banks	4
Commercial Banking
Number of subsidiaries commercial banks	4

X

- Definition

Represents the number of subsidiaries.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=qcrh_CommercialBankingSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: