Variable Interest Entities (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Variable Interest Entity [Line Items]
Current assets	$ 274,233						$ 274,233		$ 113,084
Assets	420,069						420,069		118,697
Current liabilities	52,498						52,498		15,228
Liabilities	64,916						64,916		15,609
Net loss	(15,941)	$ (9,153)	$ (51,404)	$ (5,871)	$ (981)	$ (6,033)	$ (76,498)	$ (12,885)
Affiliated Medical Groups
Variable Interest Entity [Line Items]
Percentage owned by licensed physicians							100.00%
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Current assets	1,500						$ 1,500		1,500
Assets	1,400						1,400		1,400
Current liabilities	1,400						1,400		800
Liabilities	1,800						1,800		$ 1,200
Net loss	(700)			1,400			(3,600)	(700)
Variable Interest Entity, Primary Beneficiary | Consolidation, Eliminations
Variable Interest Entity [Line Items]
Payments for services	$ 7,200			$ 5,600			$ 14,800	$ 9,200