Basis of Presentation and Summary of Significant Accounting Policies - Contributions to Revenue and Receivables by Payor (Details) - Customer Concentration Risk	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net revenue | Payor A
Concentration Risk [Line Items]
Concentration risk	12.50%	12.50%	13.60%
Net revenue | Payor B
Concentration Risk [Line Items]
Concentration risk		10.90%	13.40%
Net revenue | Payor C
Concentration Risk [Line Items]
Concentration risk	11.90%	13.10%	11.70%
Net revenue | Payor D
Concentration Risk [Line Items]
Concentration risk	15.30%	16.90%	12.90%
Gross receivables | Payor E
Concentration Risk [Line Items]
Concentration risk	45.00%	43.90%
Gross receivables | Payor F
Concentration Risk [Line Items]
Concentration risk	30.00%	36.50%