Discontinued Operations - Summary of Major Classes of Assets and Liabilities as Reported on Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Carrying amounts of major classes of assets associated with Hospitals and Large Physician Practices included as part of discontinued operations:
Cash and cash equivalents	$ 492,597	$ 132,517	$ 142,333
Total current assets attributable to discontinued operations	8,000	331,955
Carrying amounts of major classes of liabilities associated with Hospitals and Large Physician Practices included as part of discontinued operations:
Total current liabilities attributable to discontinued operations	18,612	329,347
Hospitals and Large Physician Practice [Member]
Carrying amounts of major classes of assets associated with Hospitals and Large Physician Practices included as part of discontinued operations:
Cash and cash equivalents	8,000	55,834
Restricted Cash	0	861
Accounts receivable, net of allowance of $16,584 as of December 31, 2021	0	155,447
Contract assets, net of allowance of $492 as of December 31, 2021	0	61,382
Prepaid expenses and other current assets	0	58,431
Total current assets attributable to discontinued operations	8,000	331,955
Fixed assets, net	0	38,083
Software development costs, net	0	97,416
Intangible assets, net	0	86,240
Goodwill	0	467,871
Deferred taxes, net	0	6,607
Contract assets - long-term, net of allowance of $739 as of December 31, 2021	0	28,623
Right-of-use assets - operating leases	0	50,585
Other assets	0	17,731
Total long-term assets attributable to discontinued operations	0	793,156
Carrying amounts of major classes of liabilities associated with Hospitals and Large Physician Practices included as part of discontinued operations:
Accounts payable	17,687	11,555
Accrued expenses	0	38,007
Income tax payable	925	0
Accrued compensation and benefits	0	61,167
Deferred revenue	0	205,152
Current operating lease liabilities	0	13,466
Total current liabilities attributable to discontinued operations	18,612	329,347
Deferred revenue long-term	0	2,568
Long-term operating lease liabilities	0	48,068
Other liabilities	0	270
Total long-term liabilities attributable to discontinued operations	$ 0	$ 50,906