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Note 3 - LOANS/LEASES RECEIVABLE - Changes in the ACL for OBS exposures (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Balance, beginning | $ 87,706 | $ 85,797 | $ 87,200 | $ 87,706
Provisions to expense | 3,828 | 3,260 | 11,907 | 9,031
Balance, ending | 86,321 | 87,669 | 86,321 | 87,669
Unfunded Loan Commitment |  |  |  |
Balance, beginning | 10,360 | 6,326 | 9,529 | 5,552
Provisions to expense | (344) | 546 | 487 | 1,320
Balance, ending | $ 10,016 | $ 6,872 | $ 10,016 | $ 6,872

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: |