SEGMENT AND GEOGRAPHIC INFORMATION - Summary of Total Revenue by Geography (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Total revenue	$ 285,887	$ 307,679	$ 261,110	$ 100,743	$ 119,385	$ 122,833	$ 103,599	$ 107,852	$ 955,419	$ 453,669	$ 396,647
United States
Segment Reporting Information [Line Items]
Total revenue									681,569	348,354	303,364
Europe
Segment Reporting Information [Line Items]
Total revenue									137,411	46,253	45,837
Asia
Segment Reporting Information [Line Items]
Total revenue									61,566	27,685	20,646
Rest of the world
Segment Reporting Information [Line Items]
Total revenue									$ 74,873	$ 31,377	$ 26,800