Summary of Components of Income Before Income Tax Provision from Continuing Operations (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
Income Tax Disclosure [Abstract]
Domestic									$ 66,202	$ 59,408	$ 60,315
Foreign									61,601	45,978	41,096
Income before income tax provision	$ 5,269	$ 31,983	$ 41,984	$ 48,567	$ 17,926	$ 16,486	$ 35,631	$ 35,343	$ 127,803	$ 105,386	$ 101,411