Note 4 - LOANS LEASES RECEIVABLE - Leases By Delinquency Status (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Loan	$ 6,008,610	$ 4,680,132
Delinquency Status [Member]
2022	324,782	245,701
2021	253,672	152,113
2020	140,637	66,802
2019	40,099	36,973
2018	18,925	19,169
Prior	56,142	46,979
Revolving Loans Amortized Cost Basis	81,496	55,759
Loan	915,753	623,496
Nonperforming Financial Instruments [Member]
Loan	17,514	2,760
C&I - other
Loan		1,346,602
C&I - other \| Nonperforming Financial Instruments [Member]
Loan	3,597	1,401
Commercial Portfolio Segment [Member]
Loan	1,748,992	1,595,085
Commercial Portfolio Segment [Member] \| C&I - other
Loan	1,415,996	1,346,602
Commercial Portfolio Segment [Member] \| C&I - other \| Delinquency Status [Member]
2022	145,094	117,258
2021	79,126	54,438
2020	29,652	34,034
2019	10,627	14,642
2018	2,580	4,242
Prior	172	469
Loan	267,251	225,083
Commercial Portfolio Segment [Member] \| C&I - other \| Performing Loans
2022	144,806	117,163
2021	78,379	54,261
2020	29,596	33,390
2019	10,530	14,274
2018	2,580	4,200
Prior	172	455
Loan	266,063	223,743
Commercial Portfolio Segment [Member] \| C&I - other \| Nonperforming Financial Instruments [Member]
2022	288	95
2021	747	177
2020	56	644
2019	97	368
2018		42
Prior		14
Loan	1,188	1,340
Direct financing leases
Loan	33,503	45,191
Direct financing leases \| Delinquency Status [Member]
2022	13,169	6,690
2021	5,671	12,862
2020	6,715	11,638
2019	5,144	9,287
2018	2,247	3,713
Prior	557	1,001
Loan	33,503	45,191
Direct financing leases \| Performing Loans
2022	13,169	6,690
2021	5,636	12,130
2020	6,640	11,638
2019	5,135	9,235
2018	2,237	3,695
Prior	557	956
Loan	33,374	44,344
Direct financing leases \| Nonperforming Financial Instruments [Member]
2021	35	732
2020	75
2019	9	52
2018	10	18
Prior		45
Loan	129	847
Construction and Land Development [Member] \| Nonperforming Financial Instruments [Member]
2022	524
Loan	524
Construction and Land Development [Member] \| Construction Loans [Member] \| Delinquency Status [Member]
2022	80,684	12,857
2021	48,094	2,080
2020	4,391
2019	3,379	494
2018	211	73
Prior	458
Revolving Loans Amortized Cost Basis	758	280
Loan	137,975	15,784
Construction and Land Development [Member] \| Construction Loans [Member] \| Performing Loans
2022	80,160	12,857
2021	48,094	2,080
2020	4,391
2019	3,379	494
2018	211
Prior	458
Revolving Loans Amortized Cost Basis	758	280
Loan	137,451	15,711
Construction and Land Development [Member] \| Construction Loans [Member] \| Nonperforming Financial Instruments [Member]
2018		73
Loan		73
1-4 family real estate
Loan	487,508	377,361
1-4 family real estate \| Delinquency Status [Member]
2022		104,005
2021		78,713
2020		19,001
2019		10,890
2018		10,533
Prior		44,278
Revolving Loans Amortized Cost Basis		68
Loan		267,488
1-4 family real estate \| Performing Loans
2022		104,005
2021		78,713
2020		19,001
2019		10,784
2018		10,533
Prior		43,976
Revolving Loans Amortized Cost Basis		68
Loan		267,080
1-4 family real estate \| Nonperforming Financial Instruments [Member]
2019		106
Prior		302
Loan	2,377	408
1-4 family real estate \| One To Four Family [Member] \| Delinquency Status [Member]
2022	75,143
2021	116,342
2020	95,879
2019	19,604
2018	12,461
Prior	53,501
Revolving Loans Amortized Cost Basis	1,008
Loan	373,938
1-4 family real estate \| One To Four Family [Member] \| Performing Loans
2022	75,114
2021	116,168
2020	94,924
2019	19,598
2018	12,461
Prior	53,145
Revolving Loans Amortized Cost Basis	1,008
Loan	372,418
1-4 family real estate \| One To Four Family [Member] \| Nonperforming Financial Instruments [Member]
2022	29
2021	174
2020	955
2019	6
Prior	356
Loan	1,520
Residential real estate \| Nonperforming Financial Instruments [Member]
Loan		408
Consumer
Loan	107,552	75,311
Consumer \| Delinquency Status [Member]
2022	10,692	4,891
2021	4,439	4,020
2020	4,000	2,129
2019	1,345	1,660
2018	1,426	608
Prior	1,454	1,231
Revolving Loans Amortized Cost Basis	79,730	55,411
Loan	103,086	69,950
Consumer \| Performing Loans
2022	10,533	4,891
2021	4,427	4,020
2020	3,988	2,114
2019	1,332	1,660
2018	1,394	593
Prior	1,408	1,230
Revolving Loans Amortized Cost Basis	79,730	55,411
Loan	102,812	69,919
Consumer \| Nonperforming Financial Instruments [Member]
2022	159
2021	12
2020	12	15
2019	13
2018	32	15
Prior	46	1
Loan	$ 274	$ 31

Amortized cost of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 79
-URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 6
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447

+ Details

Name:	us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of financing receivable originated four years prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of financing receivable originated in current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of financing receivable originated in fiscal year prior to current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 6
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 79
-URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448

+ Details

Name:	us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of financing receivable originated three years prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of financing receivable originated two years prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of financing receivable that can be withdrawn, repaid, and redrawn.

+ References

+ Details

Name:	us-gaap_FinancingReceivableRevolving
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 79
-URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3)(b))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 14
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 80
-URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922355-210448

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (1)

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (2)

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1404
-Paragraph (a)

+ Details

Name:	us-gaap_NotesReceivableGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FinancialInstrumentPerformanceStatusAxis=qcrh_DelinquencyStatusMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentPerformanceStatusAxis=us-gaap_NonperformingFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=qcrh_CommercialAndIndustrialOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentPerformanceStatusAxis=us-gaap_PerformingFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_FinanceLeasesPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=qcrh_ConstructionAndLandDevelopmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=qcrh_OneToFourFamilyRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=qcrh_OneToFourFamilyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: