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Discontinued Operations - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income (loss) from discontinued operations	$ 22,950	$ (786,908)	$ (1,539,910)
Deferred Tax Assets, Gross	673,595	634,995
Divestiture Of Meddata [Member]
Income (loss) from discontinued operations		5,800	347,600
Radiology Services Medical Group [Member]
Non-cash charge against goodwill		47,000	117,900
Preliminary gain loss on sale	4,000	36,400
Net Revenue		451,400	489,400
Operating Income From Discontinued Operations		73,600	75,300
Loss from Discontinued Operations		63,800	72,800
Anesthesiology Services Medical Group [Member]
Non-cash charge against goodwill			1,330,000
Preliminary gain loss on sale	26,900	663,700
Net Revenue		379,400	1,250,000
Operating Income From Discontinued Operations		716,300	1,230,000
Loss from Discontinued Operations		$ 717,200	$ 1,120,000
Deferred Tax Assets, Gross	17,000
Income Taxes Receivable	24,000
Loss Carryback Provisions	$ 9,000

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