BUSINESS COMBINATIONS - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Oct. 02, 2023	Aug. 09, 2023	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Business Acquisition [Line Items]
Goodwill			$ 2,770,971	$ 2,770,971	$ 2,740,725
Trademarks
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 8,100
Customer relationships
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	43,600
Technology-Based Intangible Assets
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	26,500
Hobsons, Inc.
Business Acquisition [Line Items]
Consideration transferred		$ 10,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		(2,400)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		6,600
Goodwill		5,700
Hobsons, Inc. | Trademarks
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		10
Hobsons, Inc. | Customer relationships
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		4,900
Hobsons, Inc. | Technology-Based Intangible Assets
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		$ 1,800
SchoolMessenger
Business Acquisition [Line Items]
Consideration transferred	300,266
Payments to Acquire Businesses, Gross	290,300
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	14,027
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	(1,128)
Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation	(409)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities	(539)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue	(30,240)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	52,451
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	63
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets	409
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	2,326
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities	(2,169)
Goodwill	247,815
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	93,827
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	$ (5,693)