Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Cash and Cash Equivalents and Restricted Cash (Details)

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Summary of Significant Accounting Policies - Cash and Cash Equivalents and Restricted Cash (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Jul. 09, 2021
Dec. 31, 2020
Sep. 30, 2020
Dec. 31, 2019
Accounting Policies [Abstract]          
Cash and cash equivalents $ 72,786   $ 49,583    
Restricted cash and cash equivalents 2,259   3,122    
Total cash, cash equivalents, and restricted cash shown in the Condensed Consolidated Statement of Cash Flows $ 75,045 $ 216,519 $ 52,705 $ 36,446 $ 51,656