ACQUISITIONS - Additional Information (Details) - USD ($) $ in Thousands						3 Months Ended	12 Months Ended
	Oct. 31, 2023	Aug. 08, 2023	Oct. 31, 2022	May 31, 2022	Feb. 08, 2022	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2023
Business Acquisition
Payments to acquire businesses, net of cash							$ 62,759	$ 163,921	$ 2,089,706
Goodwill							2,532,109	$ 2,489,308	$ 2,359,674
Financial advisory and legal fees							409
ResourceX
Business Acquisition
Cash acquired from acquisition	$ 48
Business acquisition consideration	16,300
Payments to acquire businesses, net of cash	9,100
Payment to acquire business, common stock	5,700
Contingent consideration	1,500
Total tangible assets	388
Liabilities assumed	901
Goodwill	10,000
Identifiable intangible assets acquired	7,600
Finite-lived intangible asset, useful life (in years)		9 years
Deferred tax liabilities	748
AR Inspect
Business Acquisition
Cash acquired from acquisition	1,000
Business acquisition consideration	20,500
Payments to acquire businesses, net of cash	19,100
Contingent consideration	2,400
Total tangible assets	1,800
Liabilities assumed	1,500
Goodwill	13,600
Identifiable intangible assets acquired	$ 10,000
Finite-lived intangible asset, useful life (in years)	12 years
Deferred tax liabilities	$ 2,500
Computing System Innovations, LLC
Business Acquisition
Cash acquired from acquisition		$ 415
Business acquisition consideration		36,200
Payments to acquire businesses, net of cash		33,400
Contingent consideration		3,300
Total tangible assets		1,200
Liabilities assumed		2,400
Goodwill		19,400
Identifiable intangible assets acquired		$ 18,500
Finite-lived intangible asset, useful life (in years)		13 years
Rapid Financial Solutions, LLC
Business Acquisition
Cash acquired from acquisition			$ 2,200
Business acquisition consideration			67,400
Payments to acquire businesses, net of cash			51,500
Payment to acquire business, common stock			18,200
Total tangible assets			12,900
Liabilities assumed			10,600
Goodwill			39,800
Identifiable intangible assets acquired			$ 27,600
Finite-lived intangible asset, useful life (in years)			10 years
Litigation outstanding										$ 10,000
Accounts receivable										$ 10,000
Quatred, LLC
Business Acquisition
Payments to acquire businesses, net of cash				$ 637
US eDirect Inc
Business Acquisition
Cash acquired from acquisition					$ 6,400
Business acquisition consideration					116,500
Payments to acquire businesses, net of cash			$ 122,900
Total tangible assets					9,400
Liabilities assumed					3,700
Goodwill					91,400
Identifiable intangible assets acquired					$ 34,100
Finite-lived intangible asset, useful life (in years)					13 years
Deferred tax liabilities					$ 8,326
Accounts receivable					$ 1,730
Adjustments related to goodwill							$ 10,300
Other Businesses Acquired
Business Acquisition
Business acquisition consideration						$ 2,600