Description of Business and Summary of Significant Accounting Policies - Cash, Cash Equivalents, and Restricted Cash Shown in the Statement of Cash Flows (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Cash and cash equivalents	$ 99,578	$ 105,035	$ 61,854
Restricted cash	8,114	8,519	24,756
Restricted cash included in other long-term assets	7,435		2,388
Total cash, cash equivalents, and restricted cash shown in the Condensed Consolidated Statement of Cash Flows	$ 115,127	$ 120,213	$ 88,998	$ 111,369