SEGMENT AND GEOGRAPHIC INFORMATION - Total Revenue by Major Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Total Revenues	$ 354,324	$ 359,690
United States
Segment Reporting Information [Line Items]
Total Revenues	246,852	256,726
Europe
Segment Reporting Information [Line Items]
Total Revenues	45,896	48,640
Asia Pacific
Segment Reporting Information [Line Items]
Total Revenues	39,960	35,700
Rest of World
Segment Reporting Information [Line Items]
Total Revenues	$ 21,616	$ 18,624