Summary of Significant Accounting Policies - Components of Other Long-Term Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Post-employment and other benefit/retirement liabilities	$ 54,034	$ 57,754
Insurance liabilities	33,979	48,569
Other lease obligations	37,642	40,040
Other taxes payable	15,495	18,947
Customer deposits	85,552	81,496
Guarantees related to borrowings	35,000	29,000
Other	198,254	171,943
Total other long-term liabilities	$ 459,956	$ 447,749