Name:	qcrh_AnnualPhaseInPercentageOfCapitalConservationBuffer
Namespace Prefix:	qcrh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action, plus the fully phased in capital conservation buffer of 2.5%.

No definition available.

Name:	qcrh_CapitalRequiredForCapitalAdequacyToRiskWeightedAssetsWithCapitalConservationBufferFullyPhasedIn
Namespace Prefix:	qcrh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The minimum Common Equity Tier One Capital Ratio (Common Equity Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action, plus the fully phased-in capital conservation buffer of 2.5%.

No definition available.

Name:	qcrh_CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssetsWithCapitalConservationBufferFullyPhasedIn
Namespace Prefix:	qcrh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The gross amount of proceeds from the issuance of common stock.

No definition available.

Name:	qcrh_ProceedsFromIssuanceOfCommonStockGross
Namespace Prefix:	qcrh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The value of company equity authorized for issuance filed under a universal shelf registration statement.

No definition available.

Name:	qcrh_ShelfRegistrationMaximumValueOfEquityAuthorizedForIssuance
Namespace Prefix:	qcrh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action, plus the fully phased in capital conservation buffer of 2.5%.

No definition available.