Other Noncurrent Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Liabilities, Noncurrent [Abstract]
Transition tax on foreign earnings	$ 317,745	$ 394,878
Liabilities related to uncertain tax positions	22,877	24,369
Executive deferred compensation plan obligation	26,292	25,494
Environmental liabilities	40,376	37,518	$ 32,595
Asset retirement obligations	41,489	40,450
Tax indemnification liability	45,347	42,707
Other	32,816	33,758
Total	$ 526,942	$ 599,174