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Note 14 - Federal and State Income Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Unrecognized tax benefits that would impact effective tax rate	$ 3,800	$ 2,500
Unrecognized tax benefits, interest on income taxes accrued	971	486
Domestic Tax Jurisdiction
Deferred tax assets, operating loss carryforwards, subject to expiration	2,200	2,800
Domestic Tax Jurisdiction | Community National And CNB
Deferred tax assets, operating loss carryforwards, subject to expiration	886	1,400
Domestic Tax Jurisdiction | Guaranty Bank and Trust Company
Federal Tax NOL	1,300	1,400
State and Local Jurisdiction
Deferred tax assets, operating loss carryforwards, subject to expiration	2,000	2,000
State and Local Jurisdiction | Community National And CNB
Deferred tax assets, operating loss carryforwards, subject to expiration	$ 2,000	$ 2,000

X

- Definition

Amount of additional net operating loss carryforwards.

+ References

No definition available.

+ Details

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

X

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are subject to expiration dates.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-6

+ Details

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X

- Definition

Amount of interest expense accrued for an underpayment of income taxes.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-15

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X

- Definition

The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 217
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-217

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15A
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-15A

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X

- Details

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