Income Taxes - Reconciliation of Income Tax Expense (Benefit) for Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Income tax provision at 35%	$ 121,982	$ 74,540	$ 128,958
State and local income tax, net of federal income tax effect	7,123	4,414	4,391
U.S. tax credits	(1,455)	(2,334)
Difference in effective tax rates of international operations	(35,095)	(9,633)	(16,545)
Tax on gain from sale of CCT	21,767
Tax law or rate change		3,702	2,016
Valuation allowance	1,382	4,001	(181)
Other - net	(4,007)	4,716	(2,615)
Income tax expense	$ 111,697	$ 79,406	$ 116,024