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Income Taxes - Schedule of Income Tax benefit (Provisions) from Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Income (loss) from continuing operations before benefit (provision) for income taxes									$ 6,319us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	$ 3,672us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	$ (6,558)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Benefit (provision) for income taxes	$ (422)us-gaap_IncomeTaxExpenseBenefit	$ (599)us-gaap_IncomeTaxExpenseBenefit	$ (92)us-gaap_IncomeTaxExpenseBenefit	$ (1,083)us-gaap_IncomeTaxExpenseBenefit	$ 36,767us-gaap_IncomeTaxExpenseBenefit	$ (257)us-gaap_IncomeTaxExpenseBenefit	$ (10)us-gaap_IncomeTaxExpenseBenefit	$ (17)us-gaap_IncomeTaxExpenseBenefit	$ (2,196)us-gaap_IncomeTaxExpenseBenefit	$ 36,483us-gaap_IncomeTaxExpenseBenefit	$ (792)us-gaap_IncomeTaxExpenseBenefit
Effective tax rate									34.80%us-gaap_EffectiveIncomeTaxRateContinuingOperations	(993.50%)us-gaap_EffectiveIncomeTaxRateContinuingOperations	(12.10%)us-gaap_EffectiveIncomeTaxRateContinuingOperations

X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319



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

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-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h)(2))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph h

-Subparagraph 2

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X

- Definition

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 940

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-URI http://asc.fasb.org/extlink&oid=35710027&loc=d3e41242-110953



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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690



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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-URI http://asc.fasb.org/extlink&oid=6515339



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