Income Tax Provision (Benefit) for Federal, and State and Local Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Current income tax expense, Federal									$ 7,140	$ 6,927	$ 1,511
Current income tax expense, State and local									702	3,765	1,500
Current income tax expense, Foreign									11,246	6,800	13,153
Total current									19,088	17,492	16,164
Deferred:
Deferred income tax expense, Federal									(94,114)	(110,705)	27,705
Deferred income tax expense, State and local									594	(431)	3,996
Deferred income tax expense, Foreign									(2,060)	(1,700)	423
Total deferred									(95,580)	(112,836)	32,124
Provision (benefit) for income taxes	$ (104,723)	$ 9,931	$ 7,692	$ 10,608	$ (140,427)	$ 6,275	$ 11,536	$ 27,272	$ (76,492)	$ (95,344)	$ 48,288