Discontinued Operations - Components of Income from Discontinued Operations - Tabular Disclosure (Details) - MCC Business - Discontinued Operations, Held-for-sale - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Discontinued Operations
Managed care and other revenue	$ 735,357	$ 674,760	$ 1,455,391	$ 1,332,385
Cost of care	573,374	592,975	1,175,908	1,165,839
Direct service costs and other operating expenses	92,078	71,346	176,575	141,591
Depreciation and amortization	5,379	5,299	10,705	10,590
Interest expense	18	71	89	141
Interest and other income	(1,478)	(3,200)	(4,018)	(6,415)
Total costs and expenses	(669,371)	(666,491)	(1,359,259)	(1,311,746)
Income from discontinued operation before income taxes	65,986	8,269	96,132	20,639
Provision for income taxes	29,589	1,871	40,415	5,619
Net income from discontinued operations	$ 36,397	$ 6,398	$ 55,717	$ 15,020