Business Combinations, Assets Held for Sale and Discontinued Operations - Schedule of Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating expenses:
Net loss	$ (38,392)	$ (1,268,803)	$ (718,125)	$ (1,539,314)
Radiology Partners Inc [Member]
Net revenue	125,765	125,650	340,133	366,678
Operating expenses:
Cost of service salaries and benefits	84,718	80,336	234,169	238,402
Cost of service supplies and other operating expenses	1,449	1,532	4,273	(1,468)
General and administrative expenses	19,876	20,734	57,178	64,490
Depreciation and amortization	5,090	7,595	20,328	22,757
Transformational and restructuring related expenses	2,491	441	6,517	1,487
Goodwill impairment	46,963	117,924	46,963	117,924
Total operating expenses	160,587	228,562	369,428	443,592
Loss from operations	(34,822)	(102,912)	(29,295)	(76,914)
Non-operating (expense) income, net	1,369	2,059	3,035	4,768
Loss before income taxes	(33,453)	(100,853)	(26,260)	(72,146)
Income tax (provision) benefit	(62)	3,907	(1,988)	(3,687)
Net loss	(33,515)	(96,946)	(28,248)	(75,833)
North American Partners In Anesthesia [Member]
Net revenue	2,700	309,602	377,661	924,845
Operating expenses:
Cost of service salaries and benefits	2,746	250,157	351,408	746,237
Cost of service supplies and other operating expenses	38	2,837	5,254	9,537
General and administrative expenses	215	18,338	31,179	57,909
Depreciation and amortization		5,605	6,308	17,863
Transformational and restructuring related expenses		6,785	28,634	17,506
Goodwill impairment		1,331,291		1,331,291
Loss on sale, net	4,499		644,653
Total operating expenses	7,498	1,615,013	1,067,436	2,180,343
Loss from operations	(4,798)	(1,305,411)	(689,775)	(1,255,498)
Non-operating (expense) income, net		(17)	51	(14)
Loss before income taxes	(4,798)	(1,305,428)	(689,724)	(1,255,512)
Income tax (provision) benefit	100	129,241	5,661	115,987
Net loss	$ (4,698)	$ (1,176,187)	$ (684,063)	$ (1,139,525)