SEGMENT AND GEOGRAPHIC INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Total revenue	$ 229,351	$ 260,024	$ 216,421	$ 186,024	$ 235,002	$ 246,008	$ 223,797	$ 205,111	$ 891,820	$ 909,918	$ 986,787
United States
Segment Reporting Information [Line Items]
Total revenue									545,620	553,267	581,853
Europe
Segment Reporting Information [Line Items]
Total revenue									154,510	148,036	174,445
Asia
Segment Reporting Information [Line Items]
Total revenue									59,939	72,355	88,917
Rest of the world
Segment Reporting Information [Line Items]
Total revenue									$ 131,751	$ 136,260	$ 141,572