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Note 3 - Loans/Leases Receivable - Concentration by Industries (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Loan	$ 6,784,404	$ 6,543,416
Lessors of Residential Buildings
Loan	$ 2,648,346	$ 2,328,875
Percentage of total loans/leases	39.00%	36.00%
Lessors of Non-Residential Buildings
Loan	$ 715,668	$ 673,719
Percentage of total loans/leases	11.00%	10.00%

X

- Definition

Amortized cost includes net investment in lease excluding accrued interest, before allowance for credit loss, of financing receivable.

+ References

No definition available.

+ Details

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

X

- Definition

The percentage of total loan leases.

+ References

No definition available.

+ Details

Name:	qcrh_PercentageOfTotalLoansLeases
Namespace Prefix:	qcrh_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=qcrh_LessorsOfResidentialBuildingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=qcrh_LessorsOfNonResidentialBuildingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: