Note 21 - Fair Value (Details) - Quantitative Information About Level Fair Value Measurements (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	26,256,409	19,516,934
Impaired Loans/Leases [Member] \| Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Appraisal adjustments	10.00%	10.00%
Impaired Loans/Leases [Member] \| Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Appraisal adjustments	50.00%	50.00%
Impaired Loans/Leases [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	12,467,362	9,009,557
Valuation technique	Appraisal of collateral	Appraisal of collateral
Other Real Estate Owned [Member] \| Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Appraisal adjustments	0.00%	0.00%
Other Real Estate Owned [Member] \| Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Appraisal adjustments	35.00%	35.00%
Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	13,789,047	10,507,377
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

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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: