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REVENUE RECOGNITION - Disaggregation of revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of revenue:
Revenues	$ 491,624	$ 425,548	$ 374,665
Software subscriptions
Disaggregation of revenue:
Revenues	415,473	358,415	316,763
Software licenses
Disaggregation of revenue:
Revenues	246,577	231,371	229,744
Cloud subscriptions
Disaggregation of revenue:
Revenues	168,896	127,044	87,019
Services
Disaggregation of revenue:
Revenues	$ 76,151	$ 67,133	$ 57,902

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