REVENUE RECOGNITION - Disaggregation of revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of revenue:
Total revenues	$ 572,387	$ 491,624	$ 425,548
Software subscriptions
Disaggregation of revenue:
Total revenues	480,830	415,473	358,415
Software licenses
Disaggregation of revenue:
Total revenues	266,213	246,577	231,371
Cloud subscriptions
Disaggregation of revenue:
Total revenues	214,617	168,896	127,044
Services
Disaggregation of revenue:
Total revenues	$ 91,557	$ 76,151	$ 67,133