Business Combinations and Divestitures - Additional Information (Detail) - USD ($) $ in Thousands						3 Months Ended			9 Months Ended		12 Months Ended
	May 02, 2022	Mar. 25, 2022	Aug. 23, 2021	Dec. 31, 2020	Oct. 15, 2020	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Business Acquisition [Line Items]
Business combination, acquisition related costs									$ 200
Pre-tax gain (loss) on sale of business						$ 0		$ 8,363	0	$ 8,363
Cash		$ 24,500
Purchase price in cash		24,000
Intangible assets						7,280			7,280
Goodwill						523,927			523,927		$ 506,607
Deferred taxes, net						$ 8,082			8,082		16,625
2bPrecise [Member]
Business Acquisition [Line Items]
Pre-tax gain (loss) on sale of business			$ 8,400
CarePort Purchase Agreement [Member]
Business Acquisition [Line Items]
Pre-tax gain (loss) on sale of business											$ 600
CarePort Purchase Agreement [Member] | WellSky Corp [Member]
Business Acquisition [Line Items]
Pre-tax gain (loss) on sale of business				$ 933,900
Sale of business unit				$ 1,350,000
EPSi Purchase Agreement [Member] | Strata Decision Technology LLC [Member]
Business Acquisition [Line Items]
Pre-tax gain (loss) on sale of business					$ 222,600
Sale of business unit					$ 365,000
Hospitals and Large Physician Practices business [Member]
Business Acquisition [Line Items]
Pre-tax gain (loss) on sale of business									$ 7,900
Babel Health [Member]
Business Acquisition [Line Items]
Total consideration for Babel Health		$ 24,000
Harris Dawn Holdings Inc. [Member]
Business Acquisition [Line Items]
Sale of business unit	$ 670,000
Additional cash	$ 30,000
American College of Cardiology [Member]
Business Acquisition [Line Items]
Date of acquisition							Mar. 25, 2022