Income Taxes - Components of (Benefit) Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal	$ 61us-gaap_CurrentFederalTaxExpenseBenefit	$ (565)us-gaap_CurrentFederalTaxExpenseBenefit	$ 1,870us-gaap_CurrentFederalTaxExpenseBenefit
State	(1,294)	810	377
Foreign	69us-gaap_CurrentForeignTaxExpenseBenefit	18us-gaap_CurrentForeignTaxExpenseBenefit	0us-gaap_CurrentForeignTaxExpenseBenefit
Total current provision	(1,164)us-gaap_CurrentIncomeTaxExpenseBenefit	263us-gaap_CurrentIncomeTaxExpenseBenefit	2,247us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	(5,267)	(2,584)	811
State	2,488	(1,635)	(440)
Foreign	34	0	0
Total deferred (benefit) provision	(2,745)us-gaap_DeferredOtherTaxExpenseBenefit	(4,219)us-gaap_DeferredOtherTaxExpenseBenefit	371us-gaap_DeferredOtherTaxExpenseBenefit
(Benefit) provision for income taxes	$ (3,909)us-gaap_IncomeTaxExpenseBenefit	$ (3,956)us-gaap_IncomeTaxExpenseBenefit	$ 2,618us-gaap_IncomeTaxExpenseBenefit

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of current foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

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Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of other deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. For example, but not limited to, acquisition-date income tax benefits or expenses recognized from changes in the acquirer's valuation allowance for its previously existing deferred tax assets resulting from a business combination and adjustments to beginning-of-year balance of a valuation allowance because of a change in circumstance causing a change in judgment about the realizability of the related deferred tax asset in future periods.

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Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

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

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