REVENUE Revenue by Geographic Regions (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 94,364	$ 86,453
United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	39,471	36,090
Other Americas
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	5,179	5,450
Europe, Middle East and Africa
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	36,523	33,235
Asia-Pacific
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 13,191	$ 11,678