Components of Income Tax Provision from Continuing Operations (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current
Federal									$ 23,957	$ 288	$ 16,066
State									1,943	4,681	6,673
Foreign									10,029	14,042	9,599
Current, Total									35,929	19,011	32,338
Deferred
Federal									1,546	21,657	(1,094)
State									1,265	2,309	(1,054)
Foreign									593	(373)	12,215
Deferred, Total									3,404	23,593	10,067
Income tax provision	$ 7,577	$ 6,177	$ 13,922	$ 11,657	$ 9,702	$ 12,329	$ 10,225	$ 10,348	$ 39,333	$ 42,604	$ 42,405