SEGMENT AND RELATED INFORMATION - Reconciliation of Operating Income from Segments to Consolidated (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated
Total segment operating income	$ 218,537	$ 214,249	$ 180,735
Amortization of acquired software	(1,090,652)	(1,066,341)	(882,643)
Amortization of other intangibles	(74,632)	(61,363)	(44,849)
Interest expense	(23,629)	(28,379)	(23,298)
Other income, net	3,328	1,723	1,544
Income before income taxes	198,236	187,593	158,981
Amortization of acquired software
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated
Amortization of acquired software	(36,062)	(52,192)	(45,601)
Operating segment and corporate non-segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated
Total segment operating income	$ 329,231	$ 327,804	$ 271,185