Discontinued Operations - Summary of Major Income and Expense Line Items Reported in Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Cost of revenue:
Asset impairment charges	$ 0	$ 359	$ 0	$ 531
Gain on sale of discontinued operations	5,174	0	7,939	647
Equity in net loss income of unconsolidated investments	(617)	(257)	(1,222)	(321)
Income (loss) from discontinued operations before income taxes	(434)	(6,187)	(9,252)	(6,545)
Income tax (provision) benefit	(1,137)	2,091	(57,986)	2,342
Income (loss) from discontinued operations, net of tax	3,603	(4,096)	(59,299)	(3,556)
Hospital And Large Physician Practices [Member]
Revenue:
Total revenue	(8)	224,605	284,791	691,813
Cost of revenue:
Total cost of revenue	32	145,487	189,530	442,234
Gross (loss) profit	(40)	79,118	95,261	249,579
Selling, general and administrative expenses	369	51,384	68,900	151,895
Research and development	25	24,498	32,011	83,288
Asset impairment charges	0	6,160	0	11,232
Amortization of intangible assets	0	3,455	3,538	10,376
Loss from discontinued operations	(434)	(6,379)	(9,188)	(7,212)
Other income, net	0	206	12	674
Gain on sale of discontinued operations	5,174	0	7,939	0
Equity in net loss income of unconsolidated investments	0	0	(76)	0
Income (loss) from discontinued operations before income taxes	4,740	(6,173)	(1,313)	(6,538)
Income tax (provision) benefit	(1,137)	2,091	(57,986)	2,511
Income (loss) from discontinued operations, net of tax	3,603	(4,082)	(59,299)	(4,027)
EPSi and CarePort [Member]
Revenue:
Total revenue		6		6
Cost of revenue:
Total cost of revenue		19		(29)
Gross (loss) profit		(13)		35
Selling, general and administrative expenses		2		76
Research and development		0		(32)
Loss from discontinued operations		(15)		(9)
Other income, net		1		2
Gain on sale of discontinued operations		0		647
Income (loss) from discontinued operations before income taxes		(14)		640
Income tax (provision) benefit		0		(169)
Income (loss) from discontinued operations, net of tax		(14)		471
Provider [Member] | Hospital And Large Physician Practices [Member]
Revenue:
Total revenue	(8)	224,605	284,791	691,813
Cost of revenue:
Total cost of revenue	$ 32	145,487	$ 189,530	442,234
Provider [Member] | EPSi and CarePort [Member]
Revenue:
Total revenue		6		6
Cost of revenue:
Total cost of revenue		$ 19		$ (29)