REVENUE - Geographic Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 270,731	$ 256,268	$ 921,375	$ 895,469
Percent of total revenue	100.00%	100.00%	100.00%	100.00%
U.S.
Disaggregation of Revenue [Line Items]
Revenue	$ 148,200	$ 132,016	$ 513,197	$ 515,881
Other Americas
Disaggregation of Revenue [Line Items]
Revenue	18,546	17,510	80,558	43,469
United Kingdom (“U.K.”)
Disaggregation of Revenue [Line Items]
Revenue	24,074	25,982	83,837	86,747
Europe (excluding U.K.), Middle East, and Africa
Disaggregation of Revenue [Line Items]
Revenue	46,212	46,306	140,586	143,763
Asia-Pacific
Disaggregation of Revenue [Line Items]
Revenue	$ 33,699	$ 34,454	$ 103,197	$ 105,609
Total revenue | U.S. | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percent of total revenue	55.00%	52.00%	56.00%	58.00%
Total revenue | Other Americas | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percent of total revenue	7.00%	7.00%	9.00%	5.00%
Total revenue | United Kingdom (“U.K.”) | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percent of total revenue	9.00%	10.00%	9.00%	10.00%
Total revenue | Europe (excluding U.K.), Middle East, and Africa | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percent of total revenue	17.00%	18.00%	15.00%	15.00%
Total revenue | Asia-Pacific | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percent of total revenue	12.00%	13.00%	11.00%	12.00%