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Note 3 - LOANS/LEASES RECEIVABLE - Changes in the ACL for OBS exposures (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Balance, beginning	$ 89,841	$ 87,200
Provisions (credited) to expense	4,743	3,736
Balance, ending	90,354	84,470
Unfunded Loan Commitment
Balance, beginning	8,273	9,529
Provisions (credited) to expense	(509)	(322)
Balance, ending	$ 7,764	$ 9,207

X

- Definition

Amount includes investment in lease, excluding accrued interest, of allowance for credit loss on financing receivable.

+ References

No definition available.

+ Details

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

X

- Definition

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable and net investment in lease.

+ References

No definition available.

+ Details

Name:	qcrh_FinancingReceivableAndNetInvestmentInLeaseExcludingAccruedInterestCreditLossExpenseReversal
Namespace Prefix:	qcrh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_UnfundedLoanCommitmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: