Other Comprehensive Income (Loss) - Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Equity [Abstract]
Net income	$ 160,160	$ 158,025
Other comprehensive income (loss):
Foreign currency translation	57,020	63,366
Pension and other post-retirement benefit adjustments:
Recognition of prior service credit, net of tax	(212)	(222)
Recognition of actuarial loss, net of tax	5,944	4,955
Total other comprehensive income (loss)	62,752	68,099
Comprehensive income	$ 222,912	$ 226,124