STOCK-BASED COMPENSATION - Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 35,835	$ 25,322	$ 72,422	$ 48,101
Cost of Sales | Service
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	2,345	2,410	4,313	4,224
Cost of Sales | Other revenue
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	1,203	1,113	2,274	1,900
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	9,458	8,255	18,156	14,800
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	12,724	7,054	27,050	12,793
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 10,105	$ 6,490	$ 20,629	$ 14,384