STOCK-BASED COMPENSATION - Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 26,839	$ 19,317	$ 74,940	$ 50,305
Cost of Sales | Service
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	2,472	1,387	6,696	3,566
Cost of Sales | Other revenue
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	1,142	839	3,042	2,330
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	8,297	5,535	23,097	13,616
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	9,363	5,197	22,156	14,458
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 5,565	$ 6,359	$ 19,949	$ 16,335