Summary of Significant Accounting Policies - Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Cash and cash equivalents	$ 340,703	$ 497,653	$ 335,789
Restricted cash	3,000	4,218	3,746
Total cash, cash equivalents and restricted cash in the Condensed Statements of Cash Flows	$ 343,703	$ 501,871	$ 339,535	$ 88,218