Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 1,079,716	$ 1,117,602	$ 937,763
PSAV | Revenue Benchmark | Contract Type
Disaggregation of Revenue [Line Items]
Percent of revenues (percent)	92.20%	92.90%	92.90%
PEPM | Revenue Benchmark | Contract Type
Disaggregation of Revenue [Line Items]
Percent of revenues (percent)	7.20%	6.50%	6.30%
Other | Revenue Benchmark | Contract Type
Disaggregation of Revenue [Line Items]
Percent of revenues (percent)	0.60%	0.70%	0.80%
Network Services
Disaggregation of Revenue [Line Items]
Revenues	$ 245,280	$ 278,457	$ 271,262
Network Services | PSAV
Disaggregation of Revenue [Line Items]
Revenues	183,742	215,449	208,276
Network Services | PEPM
Disaggregation of Revenue [Line Items]
Revenues	55,001	55,684	55,301
Network Services | Other
Disaggregation of Revenue [Line Items]
Revenues	6,537	7,324	7,685
Analytic-Based Services
Disaggregation of Revenue [Line Items]
Revenues	713,715	709,272	564,661
Analytic-Based Services | PSAV
Disaggregation of Revenue [Line Items]
Revenues	691,524	692,880	560,981
Analytic-Based Services | PEPM
Disaggregation of Revenue [Line Items]
Revenues	22,191	16,392	3,680
Payment Integrity Services
Disaggregation of Revenue [Line Items]
Revenues	120,721	129,873	101,840
Payment Integrity Services | PSAV
Disaggregation of Revenue [Line Items]
Revenues	120,259	129,477	101,753
Payment Integrity Services | PEPM
Disaggregation of Revenue [Line Items]
Revenues	$ 462	$ 396	$ 87