Revenue - Accounts Receivable, Unbilled Services, and Deferred Revenue (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Accounts receivable
Accounts receivable, beginning balance	$ 96,210,000	$ 454,993,000
Additions	146,424,000	625,124,000
Deductions	(115,950,000)	(601,961,000)
Accounts receivable, ending balance	126,684,000	478,156,000
Allowance for doubtful accounts
Allowance for doubtful accounts, beginning balance	(13,835,000)	0
Additions	0	0
Deductions	0	0
Allowance for doubtful accounts, end balance	(13,835,000)	0
Deferred revenue
Deferred revenue, beginning balance	549,551,000	1,595,472,000
Additions	140,324,000	49,094,000
Deductions	(49,000)	(108,586,000)
Deferred revenue, ending balance	$ 689,826,000	$ 1,535,980,000