Other Noncurrent Liabilities - Summary of Other Noncurrent Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Other Liabilities Disclosure [Abstract]
Reserve for uncertain tax positions	$ 7,312	$ 12,186
Insurance claims and expenses	620	589
Other	560	767
Total	$ 8,492	$ 13,542