NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Millions	Jun. 30, 2026 subsidiary	Dec. 31, 2025 USD ($)
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Number of subsidiaries commercial banks \| subsidiary	4
Reclassified totalling \| $		$ 77.3

Amount of derivative assets and liabilities presented on a net basis under ASC 21020 due to legally enforceable master netting arrangements.

No definition available.

Name:	qcrh_DerivativeAssetsLiabilitiesNetUnderMasterNettingArrangement
Namespace Prefix:	qcrh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant