Income Taxes (Detail) - Summary of Components of Income Before Income Taxes - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
U.S.	$ 182,178	$ 165,848	$ 188,963
Non-U.S.	106,253	106,363	85,720
Income before income taxes	$ 288,431	$ 272,211	$ 274,683