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Income Taxes - Schedule of Income Tax (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current	$ 3,151us-gaap_CurrentIncomeTaxExpenseBenefit	$ 11us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred	11us-gaap_DeferredIncomeTaxExpenseBenefit	1,362us-gaap_DeferredIncomeTaxExpenseBenefit
Income tax expense	$ 3,162us-gaap_IncomeTaxExpenseBenefit	$ 1,373us-gaap_IncomeTaxExpenseBenefit

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

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