Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 1,117,602	$ 937,763	$ 982,901
Network Services
Disaggregation of Revenue [Line Items]
Revenues	278,457	271,262	314,510
Network Services | PSAV
Disaggregation of Revenue [Line Items]
Revenues	215,449	208,276	249,095
Network Services | PEPM
Disaggregation of Revenue [Line Items]
Revenues	55,684	55,301	56,841
Network Services | Other
Disaggregation of Revenue [Line Items]
Revenues	7,324	7,685	8,574
Analytic-Based Services
Disaggregation of Revenue [Line Items]
Revenues	709,272	564,661	561,525
Analytic-Based Services | PSAV
Disaggregation of Revenue [Line Items]
Revenues	692,880	560,981	560,675
Analytic-Based Services | PEPM
Disaggregation of Revenue [Line Items]
Revenues	16,392	3,680	850
Payment Integrity Services
Disaggregation of Revenue [Line Items]
Revenues	129,873	101,840	106,866
Payment Integrity Services | PSAV
Disaggregation of Revenue [Line Items]
Revenues	129,477	101,753	106,782
Payment Integrity Services | PEPM
Disaggregation of Revenue [Line Items]
Revenues	$ 396	$ 87	$ 84