Total Provision For Income Taxes (Detail) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Federal, current	$ (13,900,000)us-gaap_CurrentFederalTaxExpenseBenefit	$ (2,000,000)us-gaap_CurrentFederalTaxExpenseBenefit	$ 9,800,000us-gaap_CurrentFederalTaxExpenseBenefit
State and local, current	(1,100,000)	300,000	1,400,000
Current income tax expense/(benefit)	(15,000,000)us-gaap_CurrentIncomeTaxExpenseBenefit	(1,700,000)us-gaap_CurrentIncomeTaxExpenseBenefit	11,200,000us-gaap_CurrentIncomeTaxExpenseBenefit
Federal, deferred	21,000,000	(43,200,000)	(25,700,000)
State and local, deferred	1,600,000	(13,900,000)	(5,500,000)
Foreign, deferred	100,000	0	0
Deferred income taxes	22,700,000	(57,100,000)	(31,200,000)
Income tax expense/(benefit)	$ 7,671,000us-gaap_IncomeTaxExpenseBenefit	$ (58,773,000)us-gaap_IncomeTaxExpenseBenefit	$ (20,020,000)us-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 foreign 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.