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Note 5 - DERIVATIVES AND HEDGING ACTIVITIES - Hedged Interest Rate Swaps and Non-hedged Interest Rate Swaps (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Derivative [Line Items]
Swapped loan portfolio loan-to-value percentage, including the potential swap exposure	65.00%
Interest rate swaps
Derivative [Line Items]
Interest rate swaps collateralized by investment securities	$ 223,172	$ 214,892
Interest rate swaps | Cash
Derivative [Line Items]
Interest rate swaps collateralized by investment securities	53,401	39,431
Interest rate swaps | U.S. govt. sponsored agency securities
Derivative [Line Items]
Interest rate swaps collateralized by investment securities	6,408	6,222
Interest rate swaps | Municipal securities
Derivative [Line Items]
Interest rate swaps collateralized by investment securities	146,041	151,107
Interest rate swaps | Residential mortgage-backed and related securities
Derivative [Line Items]
Interest rate swaps collateralized by investment securities	$ 17,322	$ 18,132

X

- Definition

Carrying value of financial instrument held by the entity for its own account (proprietary securities) for trading or investment purposes that are reported at carrying value and pledged to counterparties as collateral for financing transactions.

+ References

No definition available.

+ Details

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

X

- Definition

For the Entity's swapped loan portfolio, this represents the maximum loan-to-value, including the potential swap exposure, percentage.

+ References

No definition available.

+ Details

Name:	qcrh_SwappedLoanPortfolioLoanToValuePercentage
Namespace Prefix:	qcrh_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

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Data Type:	xbrli:stringItemType
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X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: