GOODWILL AND INTANGIBLE ASSETS - Goodwill (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Goodwill [Line Items]
Total goodwill	$ 25,885	$ 25,885
Banking
Goodwill [Line Items]
Total goodwill	271	271
Payments
Goodwill [Line Items]
Total goodwill	13,814	13,814
Technology
Goodwill [Line Items]
Total goodwill	$ 11,800	$ 11,800