REVENUE - Geographic Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 274,337	$ 325,702	$ 650,644	$ 639,201
Percent of total revenue	100.00%	100.00%	100.00%	100.00%
U.S.
Disaggregation of Revenue [Line Items]
Revenue	$ 147,725	$ 189,297	$ 364,997	$ 383,865
Other Americas
Disaggregation of Revenue [Line Items]
Revenue	16,261	14,058	62,012	25,959
United Kingdom (“U.K.”)
Disaggregation of Revenue [Line Items]
Revenue	28,831	32,553	59,763	60,765
Europe (excluding U.K.), Middle East, and Africa
Disaggregation of Revenue [Line Items]
Revenue	45,238	45,798	94,374	97,457
Asia-Pacific
Disaggregation of Revenue [Line Items]
Revenue	$ 36,282	$ 43,996	$ 69,498	$ 71,155
Total revenue | U.S. | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percent of total revenue	54.00%	58.00%	55.00%	60.00%
Total revenue | Other Americas | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percent of total revenue	6.00%	4.00%	10.00%	4.00%
Total revenue | United Kingdom (“U.K.”) | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percent of total revenue	11.00%	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	16.00%	14.00%	15.00%	15.00%
Total revenue | Asia-Pacific | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percent of total revenue	13.00%	14.00%	11.00%	11.00%