GOODWILL AND OTHER INTANGIBLES - Schedule of Intangibles (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Goodwill and Other Intangible Assets [Line Items]
Cost	$ 136,606	$ 136,583
Accumulated Amortization	(133,474)	(132,751)
Net Book Value	3,132	3,832
Client-related
Goodwill and Other Intangible Assets [Line Items]
Cost	63,130	63,107
Accumulated Amortization	(61,760)	(61,395)
Net Book Value	1,370	1,712
Technology
Goodwill and Other Intangible Assets [Line Items]
Cost	68,115	68,115
Accumulated Amortization	(66,353)	(65,995)
Net Book Value	1,762	2,120
Other
Goodwill and Other Intangible Assets [Line Items]
Cost	5,361	5,361
Accumulated Amortization	(5,361)	(5,361)
Net Book Value	$ 0	$ 0
Minimum | Client-related
Goodwill and Other Intangible Assets [Line Items]
Useful Lives	4 years	4 years
Minimum | Technology
Goodwill and Other Intangible Assets [Line Items]
Useful Lives	2 years	2 years
Minimum | Other
Goodwill and Other Intangible Assets [Line Items]
Useful Lives	1 year	1 year
Maximum | Client-related
Goodwill and Other Intangible Assets [Line Items]
Useful Lives	10 years	10 years
Maximum | Technology
Goodwill and Other Intangible Assets [Line Items]
Useful Lives	10 years	10 years
Maximum | Other
Goodwill and Other Intangible Assets [Line Items]
Useful Lives	5 years	5 years