Income Taxes - Provisions for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal	$ (1,452)us-gaap_CurrentFederalTaxExpenseBenefit	$ (1,225)us-gaap_CurrentFederalTaxExpenseBenefit	$ 28,654us-gaap_CurrentFederalTaxExpenseBenefit
State	1,013	1,357	4,695
Total Current	(439)us-gaap_CurrentIncomeTaxExpenseBenefit	132us-gaap_CurrentIncomeTaxExpenseBenefit	33,349us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	12,278	32,197	559
State	561	3,092	(314)
Total Deferred	12,839us-gaap_DeferredIncomeTaxExpenseBenefit	35,289us-gaap_DeferredIncomeTaxExpenseBenefit	245us-gaap_DeferredIncomeTaxExpenseBenefit
Provisions for income taxes	$ 12,400us-gaap_IncomeTaxExpenseBenefit	$ 35,421us-gaap_IncomeTaxExpenseBenefit	$ 33,594us-gaap_IncomeTaxExpenseBenefit

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

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

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

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

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

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