Note 6 - Fair Value (Details) - Quantitative Information About Level Fair Value Measurements (USD $)	3 Months Ended	12 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	23,708,408	26,256,409
Impaired Loans/Leases [Member] \| Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	10.00%	10.00%
Impaired Loans/Leases [Member] \| Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	50.00%	50.00%
Impaired Loans/Leases [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	9,403,469	12,467,362
Valuation technique	Appraisal of collateral	Appraisal of collateral
Other Real Estate Owned [Member] \| Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	0.00%	0.00%
Other Real Estate Owned [Member] \| Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	35.00%	35.00%
Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	14,304,939	13,789,047
Valuation technique	Appraisal of collateral	Appraisal of collateral

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

No definition available.

+ Details

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

- Details

Name:	us-gaap_FairValueInputsAssetsQuantitativeInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of adjustment to the observed price for a similar asset or liability when an identical transaction does not exist, used as an input to measure fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bbb)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

- Definition

Description of the inputs and valuation technique(s) used to measure fair value.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_FairValueByAssetClassAxis=qcrh_ImpairedLoansLeasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=qcrh_OtherRealEstateOwnedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: