Other Non-Current Liabilities - Statement of Composition of Other Non Current Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other Liabilities Disclosure [Abstract]
Deferred revenue	$ 1,215	$ 1,539
Environmental and legal matters	20,404	21,888
Deferred compensation liability	43,819	51,890
Pension liability	26,722	25,632
Other non-current liabilities	11,704	29,484
Total other non-current liabilities	$ 103,864	$ 130,433