Other Non-Current Liabilities - Statement of Composition of Other Non Current Liablities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Deferred revenue	$ 2,988	$ 3,318
Environmental and legal matters	18,258	20,583
Deferred compensation liability	43,042	37,790
Pension liability	41,252	45,738
Other non-current liabilities	9,221	5,427
Total other non-current liabilities	$ 114,761	$ 112,856