Discontinued Operations - Summary of Major Classes of Assets and Liabilities as Reported on Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 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		$ 82,782	$ 132,517	$ 453,772
Total current assets		1,540,684	1,554,498
Total assets		2,430,255	2,425,229
Carrying amounts of major classes of liabilities associated with EPSi and CarePort included as part of discontinued operations:
Total current liabilities		646,855	597,988
Total liabilities		1,077,149	1,017,091
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		67,671	55,834
Restricted Cash		847	861
Accounts receivable, net of allowance of $18,045 and $16,584 as of March 31, 2022 and December 31, 2021, respectively		200,407	155,447
Contract assets, net of allowance of [$0] as of March 31, 2022 and December 31, 2021		68,786	61,382
Prepaid expenses and other current assets		63,310	58,431
Total current assets		401,021	331,955
Fixed assets, net		33,686	38,083
Software development costs, net		91,810	97,416
Intangible assets, net		77,997	86,240
Goodwill		467,725	467,871
Deferred taxes, net		8,393	6,607
Contract assets - long-term, net of allowance of [$0] as of March 31, 2022 and December 31, 2021		31,934	28,623
Right-of-use assets - operating leases		48,089	50,585
Other assets		14,092	17,731
Total assets	[1]	1,174,747	1,125,111
Carrying amounts of major classes of liabilities associated with EPSi and CarePort included as part of discontinued operations:
Accounts payable		21,708	11,555
Accrued expenses		45,852	38,007
Accrued compensation and benefits		37,506	61,167
Deferred revenue		274,541	205,152
Current operating lease liabilities		13,613	13,466
Total current liabilities		393,220	329,347
Deferred revenue long-term		475	2,568
Long-term operating lease liabilities		44,952	48,068
Other liabilities		341	270
Total liabilities	[1]	$ 438,988	$ 380,253

[1] (1) The total assets and total liabilities in the above table for the three months ended March 31, 2022 and for the year ended December 31, 2021, are presented in the balance sheet as of March 31, 2022 as Assets held for sale and Liabilities related to assets held for sale.