DISAGGREGATION OF REVENUE - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue
Total revenues	$ 2,332,340	$ 2,137,803	$ 1,951,751
Corporate Nonsegment
Disaggregation of Revenue
Total revenues	9,365	6,953	7,330
Enterprise Software \| Operating Segments
Disaggregation of Revenue
Total revenues	1,694,421	1,511,602	1,349,655
Platform Technologies \| Operating Segments
Disaggregation of Revenue
Total revenues	628,554	619,248	594,766
Recurring revenues
Disaggregation of Revenue
Total revenues	2,031,817	1,806,063	1,626,173
Recurring revenues \| Corporate Nonsegment
Disaggregation of Revenue
Total revenues	0	0	0
Recurring revenues \| Enterprise Software \| Operating Segments
Disaggregation of Revenue
Total revenues	1,432,317	1,232,930	1,077,043
Recurring revenues \| Platform Technologies \| Operating Segments
Disaggregation of Revenue
Total revenues	599,500	573,133	549,130
Non-recurring revenues
Disaggregation of Revenue
Total revenues	300,523	331,740	325,578
Non-recurring revenues \| Corporate Nonsegment
Disaggregation of Revenue
Total revenues	9,365	6,953	7,330
Non-recurring revenues \| Enterprise Software \| Operating Segments
Disaggregation of Revenue
Total revenues	262,104	278,672	272,612
Non-recurring revenues \| Platform Technologies \| Operating Segments
Disaggregation of Revenue
Total revenues	29,054	46,115	45,636
SaaS \| Recurring revenues
Disaggregation of Revenue
Total revenues	777,769	644,779	527,977
SaaS \| Recurring revenues \| Corporate Nonsegment
Disaggregation of Revenue
Total revenues	0	0	0
SaaS \| Recurring revenues \| Enterprise Software \| Operating Segments
Disaggregation of Revenue
Total revenues	691,288	559,842	459,544
SaaS \| Recurring revenues \| Platform Technologies \| Operating Segments
Disaggregation of Revenue
Total revenues	86,481	84,937	68,433
Transaction-based fees \| Recurring revenues
Disaggregation of Revenue
Total revenues	808,434	698,152	631,535
Transaction-based fees \| Recurring revenues \| Corporate Nonsegment
Disaggregation of Revenue
Total revenues	0	0	0
Transaction-based fees \| Recurring revenues \| Enterprise Software \| Operating Segments
Disaggregation of Revenue
Total revenues	318,143	234,633	174,718
Transaction-based fees \| Recurring revenues \| Platform Technologies \| Operating Segments
Disaggregation of Revenue
Total revenues	490,291	463,519	456,817
Maintenance
Disaggregation of Revenue
Total revenues	445,614	463,132	466,661
Maintenance \| Recurring revenues
Disaggregation of Revenue
Total revenues	445,614	463,132	466,661
Maintenance \| Recurring revenues \| Corporate Nonsegment
Disaggregation of Revenue
Total revenues	0	0	0
Maintenance \| Recurring revenues \| Enterprise Software \| Operating Segments
Disaggregation of Revenue
Total revenues	422,886	438,455	442,781
Maintenance \| Recurring revenues \| Platform Technologies \| Operating Segments
Disaggregation of Revenue
Total revenues	22,728	24,677	23,880
Professional services
Disaggregation of Revenue
Total revenues	242,700	263,991	249,976
Professional services \| Non-recurring revenues
Disaggregation of Revenue
Total revenues	242,700	263,991	249,976
Professional services \| Non-recurring revenues \| Corporate Nonsegment
Disaggregation of Revenue
Total revenues	0	0	0
Professional services \| Non-recurring revenues \| Enterprise Software \| Operating Segments
Disaggregation of Revenue
Total revenues	213,749	219,933	209,727
Professional services \| Non-recurring revenues \| Platform Technologies \| Operating Segments
Disaggregation of Revenue
Total revenues	28,951	44,058	40,249
Software licenses and royalties \| Non-recurring revenues
Disaggregation of Revenue
Total revenues	12,816	26,357	38,096
Software licenses and royalties \| Non-recurring revenues \| Corporate Nonsegment
Disaggregation of Revenue
Total revenues	0	0	0
Software licenses and royalties \| Non-recurring revenues \| Enterprise Software \| Operating Segments
Disaggregation of Revenue
Total revenues	13,049	25,292	32,709
Software licenses and royalties \| Non-recurring revenues \| Platform Technologies \| Operating Segments
Disaggregation of Revenue
Total revenues	(233)	1,065	5,387
Hardware and other \| Non-recurring revenues
Disaggregation of Revenue
Total revenues	45,007	41,392	37,506
Hardware and other \| Non-recurring revenues \| Corporate Nonsegment
Disaggregation of Revenue
Total revenues	9,365	6,953	7,330
Hardware and other \| Non-recurring revenues \| Enterprise Software \| Operating Segments
Disaggregation of Revenue
Total revenues	35,306	33,447	30,176
Hardware and other \| Non-recurring revenues \| Platform Technologies \| Operating Segments
Disaggregation of Revenue
Total revenues	$ 336	$ 992	$ 0