Revenue, Receivables, and Concentration of Credit Risk - Schedules of Concentration of Risk as a Percentage of Revenues and Receivables (Details) - Major Payors	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Total Revenues | Payor A
Concentration Risk [Line Items]
Concentration risk, percentage	26.00%	26.00%	25.00%	26.00%
Total Revenues | Payor B
Concentration Risk [Line Items]
Concentration risk, percentage	19.00%	21.00%	19.00%	20.00%
Total Revenues | Payor C
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%	15.00%	14.00%	16.00%
Total Revenues | Payor D
Concentration Risk [Line Items]
Concentration risk, percentage		11.00%		11.00%
Receivables | Payor A
Concentration Risk [Line Items]
Concentration risk, percentage			13.00%		18.00%
Receivables | Payor B
Concentration Risk [Line Items]
Concentration risk, percentage			22.00%		21.00%
Receivables | Payor C
Concentration Risk [Line Items]
Concentration risk, percentage			10.00%		14.00%
Receivables | Payor D
Concentration Risk [Line Items]
Concentration risk, percentage					12.00%