Interest on deferred compensation amounts.

No definition available.

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

- Definition

The amount of payment into the fund established for purposes of making future disbursements to the individual in accordance with the terms and understanding of the deferred compensation arrangement.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The increase in the fair value of plan assets from contributions made by the employer.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)(3)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

+ Details

Name:	us-gaap_DefinedBenefitPlanContributionsByEmployer
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 11

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum percentage of employee gross pay, by the terms of the plan, that the employer may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanMaximumAnnualContributionPerEmployeePercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Note 12 - Employee Benefit Plans (Detail) (USD $)	12 Months Ended
Note 12 - Employee Benefit Plans (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent	4.50%
Defined Contribution Plan, Cost Recognized (in Dollars)	$ 289,437	$ 190,105	$ 157,261
Deferred Compensation Liability, Current and Noncurrent (in Dollars)	5,151,630	4,202,733	3,469,525	2,734,989
Certain Executive Officers [Member] \| Minimum [Member]
Deferred Compensation Arrangement with Individual, Employer Contribution (in Dollars)	10,000
Interest on Deferred Compensation Amounts	6.00%
Certain Executive Officers [Member] \| Maximum [Member]
Deferred Compensation Arrangement with Individual, Employer Contribution (in Dollars)	20,000
Interest on Deferred Compensation Amounts	12.00%
Certain Management Officers [Member] \| Minimum [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent	4.00%
Interest on Deferred Compensation Amounts	4.00%
Certain Management Officers [Member] \| Maximum [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent	10.00%
Certain Management Officers [Member] \| Maximum [Member]
Interest on Deferred Compensation Amounts	8.00%
Agreements with Certain Management and Executive Officers [Member]
Deferred Compensation Liability, Current and Noncurrent (in Dollars)	5,151,630
Agreements with Certain Management and Executive Officers [Member]
Deferred Compensation Liability, Current and Noncurrent (in Dollars)		4,202,733
First Three Percent of Employees Wages [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent	100.00%
Match at 100 Percent [Member]
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent	3.00%
From Four to Four and a Half Percent of Employee's Wages [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent	50.00%
Matched at 50% [Member]
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent	3.00%
Supplemental Executive Retirement Plans [Member]
Deferred Compensation Liability, Current and Noncurrent (in Dollars)	2,802,497	2,630,060
Defined Benefit Plan, Contributions by Employer (in Dollars)	$ 117,000	$ 117,000