Specific allowance of amount of investment in financing receivables modified by troubled debt restructurings.

No definition available.

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Namespace Prefix:	qcrh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after troubled debt restructuring, of modified financing receivable.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount, before troubled debt restructuring, of financing receivable to be modified.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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NOTE 3 - LOANS/LEASES RECEIVABLE - Troubled Debt Restructurings (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Number of Loans / Leases	0	3	3	8
Pre-Modification Recorded Investment		$ 197	$ 2,599	$ 453
Post-Modification Recorded Investment		$ 197	2,599	$ 453
Specific Allowance			12
Payment Deferral [Member]
Number of Loans / Leases		3		8
Pre-Modification Recorded Investment		$ 197	$ 453
Post-Modification Recorded Investment		$ 197		$ 453
Interest Rate Adjusted Below Market
Number of Loans / Leases			2
Pre-Modification Recorded Investment			$ 67
Post-Modification Recorded Investment			67
Specific Allowance			$ 12
Direct financing leases \| Payment Deferral [Member]
Number of Loans / Leases				3
Pre-Modification Recorded Investment				$ 145
Post-Modification Recorded Investment				$ 145
Commercial Portfolio Segment [Member] \| Payment Deferral [Member]
Number of Loans / Leases		3		5
Pre-Modification Recorded Investment		$ 197		$ 308
Post-Modification Recorded Investment		$ 197		$ 308
1-4 family real estate \| Extended Maturity [Member]
Number of Loans / Leases			1
Pre-Modification Recorded Investment			$ 2,532
Post-Modification Recorded Investment			$ 2,532
1-4 family real estate \| Interest Rate Adjusted Below Market
Number of Loans / Leases			1
Pre-Modification Recorded Investment			$ 54
Post-Modification Recorded Investment			54
Specific Allowance			$ 6
Consumer \| Interest Rate Adjusted Below Market
Number of Loans / Leases			1
Pre-Modification Recorded Investment			$ 13
Post-Modification Recorded Investment			13
Specific Allowance			$ 6