Supplemental Disclosure of Cash Flow Information - Cash and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents	$ 240,227	$ 398,267
Restricted cash	26,856	27,683
Long-term restricted cash	34,614	24,268
Total cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows	$ 301,697	$ 450,218	$ 282,546	$ 277,322