Description of Business and Summary of Significant Accounting Policies - Accounts Receivables and Allowances (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 156,110		$ 156,110		$ 153,609
Allowance for doubtful accounts	18,772		18,772		19,874
Provision for doubtful accounts	(15)	$ 73	1,687	$ (2,742)
Billed Revenues
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	156,100		156,100		153,600
Unbilled Revenues
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 56,100		$ 56,100		$ 50,100