Summary of Significant Accounting Policies - Components of Other Long-Term Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Post-employment and other benefit/retirement liabilities	$ 56,723	$ 54,034
Insurance liabilities	37,608	33,979
Other lease obligations	39,221	37,642
Other taxes payable	16,997	15,495
Customer deposits	79,528	85,552
Guarantees related to borrowings	42,000	35,000
Other	195,981	198,254
Total other long-term liabilities	$ 468,058	$ 459,956