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Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015
Income Tax Examination [Line Items]
Gross liability for tax and interest positions	$ 475,000us-gaap_LiabilityForUncertainTaxPositionsCurrent
Reduction in income tax liability if tax positions sustained	$ 313,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
Income tax examination years description	The Company is no longer subject to U.S. Federal income tax examinations for the years prior to 2010.
State Tax Authority | Minimum
Income Tax Examination [Line Items]
Income tax examination year	2010
State Tax Authority | Maximum
Income Tax Examination [Line Items]
Income tax examination year	2013

X

- Definition

A brief description of status of the tax examination, significant findings to date, and the entity's position with respect to the findings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (d)(2)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

+ Details

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X

- Definition

Tax year being audited in the income tax examination, in CCYY format.

+ References

No definition available.

+ Details

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X

- Definition

The current portion of the amount recognized for uncertain tax positions as of the balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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X

- Definition

The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

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