Summary of Significant Accounting Policies - Cash and Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Accounting Policies [Abstract]
Cash and cash equivalents	$ 300,089	$ 334,183
Overnight money market funds	160,900	267,100
Restricted cash	$ 153,449	$ 159,898