Basis of Presentation and Summary of Significant Accounting Policies - Reconciliation of Cash and Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Feb. 09, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	$ 99,896	$ 33,333	$ 62,892
Restricted cash	1,614	2,642	1,140
Restricted cash, long-term	113,938	12,384	14,014
Total cash and cash equivalents and restricted cash	$ 215,448	588,628
Total cash and cash equivalents and restricted cash		$ 48,359	$ 78,046	$ 101,414