Summary of Significant Accounting Policies - Summary of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Capital revenue	$ 501,780	$ 252,974	$ 1,148,041	$ 544,617
Fee-for-service and other revenue	25,018	10,159	52,055	25,020
Total revenue	$ 526,798	$ 263,133	$ 1,200,096	$ 569,637
Percentage of capital revenue	95.30%	96.10%	95.70%	95.60%
Percentage of fee for service and other revenue	4.70%	3.90%	4.30%	4.40%
Total revenue	100.00%	100.00%	100.00%	100.00%
Medicare
Disaggregation of Revenue [Line Items]
Capital revenue	$ 447,250	$ 220,591	$ 1,008,329	$ 455,986
Percentage of capital revenue	84.90%	83.80%	84.00%	80.00%
Other capitated revenue
Disaggregation of Revenue [Line Items]
Capital revenue	$ 54,530	$ 32,383	$ 139,712	$ 88,631
Percentage of capital revenue	10.40%	12.30%	11.60%	15.60%
Fee-for-service
Disaggregation of Revenue [Line Items]
Fee-for-service and other revenue	$ 8,176	$ 3,258	$ 17,113	$ 6,269
Percentage of fee for service and other revenue	1.60%	1.20%	1.40%	1.10%
Pharmacy
Disaggregation of Revenue [Line Items]
Fee-for-service and other revenue	$ 10,096	$ 6,154	$ 25,619	$ 17,207
Percentage of fee for service and other revenue	1.80%	2.40%	2.10%	3.00%
Other
Disaggregation of Revenue [Line Items]
Fee-for-service and other revenue	$ 6,746	$ 747	$ 9,323	$ 1,544
Percentage of fee for service and other revenue	1.30%	0.30%	0.80%	0.30%