Accounting Standards and Significant Accounting Policies (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
New Accounting Pronouncements or Change in Accounting Principle
Accounts receivable, net	$ 633,700	$ 585,500
Accounts receivable, allowance for doubtful accounts	17,024	14,761
Goodwill	2,510,488	2,489,308
Case Management Business Process Management Data And Insight
New Accounting Pronouncements or Change in Accounting Principle
Goodwill		$ 1,700,000
Percentage of total goodwill (percent)		70.00%
Unbilled Revenues
New Accounting Pronouncements or Change in Accounting Principle
Accounts receivable, net	130,500	$ 135,400
Unbilled Revenues | Retention Receivable
New Accounting Pronouncements or Change in Accounting Principle
Accounts receivable, net	$ 8,700	$ 8,600