Components of Income Tax Provision From Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current
Current, Federal									$ 288	$ 16,066	$ 21,172
Current, State									4,681	6,673	6,268
Current, Foreign									14,042	9,599	7,021
Current, Total									19,011	32,338	34,461
Deferred
Deferred, Federal									21,657	(1,094)	7,553
Deferred, State									2,309	(1,054)	(719)
Deferred, Foreign									(373)	12,215	(1,195)
Deferred, Total									23,593	10,067	5,639
Income tax provision	$ 9,702	$ 12,329	$ 10,225	$ 10,348	$ 5,859	$ 3,360	$ 23,315	$ 9,871	$ 42,604	$ 42,405	$ 40,100