Note 10 - ACQUISITION (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
Apr. 01, 2022	Mar. 31, 2022
Business Acquisition [Line Items]
Business Combination, Consideration Transferred		$ 117,200
Acquisition costs		1,851
Business combination, stock consideration		1,900
Guaranty Federal Bancshares, Inc \| Pending Acquisition
Business Acquisition [Line Items]
Total assets acquired		1,200,000
Business acquisition loan acquired		821,000
Deposits assumed in business combination		$ 1,100,000
Business combination consideration in cash (per share)	$ 30.50
Business acquisition, equity interest issued or issuable, number of shares	0.58775
Business combination mixed consideration in cash (per share)	$ 6.10
Business combination shares issuable mixed consideration	0.4702
Business acquisition, share price		$ 56.59
Business Combination, Consideration Transferred		$ 26,900

The per share amount of consideration in cash associated with the acquisition of business during the period.

No definition available.

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Period Type:	instant

- Definition

The per share amount of mixed consideration in cash associated with the acquisition of business during the period.

+ References

No definition available.

+ Details

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- Definition

The amount of deposits assumed in a business combination.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Number of shares of equity interests issued or issuable as mixed consideration in a business combination.

+ References

No definition available.

+ Details

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Namespace Prefix:	qcrh_
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Period Type:	duration

- Definition

Consideration in the form of stock.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Number of shares of equity interests issued or issuable to acquire entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479

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- 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

No definition available.

+ Details

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- Definition

Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

+ References

No definition available.

+ Details

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- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=123586518&loc=d3e1043-128460

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Balance Type:	debit
Period Type:	duration

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of assets acquired at the acquisition date.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
-Paragraph 1
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- Definition

The amount of financial liabilities assumed (as defined) which have been recognized as of the acquisition date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 55
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