Details Of Certain Accounts - Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Contract assets	$ 367	$ 2,446
Prepaids	18,301	15,904
Deferred costs	8,792	23,522
Income tax receivable		20,787
Other receivable	28,184	29,782
Other	6,798	9,651
Total other current assets	$ 62,442	$ 102,092