TREASURY STOCK (Details) - USD ($) $ in Thousands	6 Months Ended		35 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Jan. 16, 2018	Oct. 24, 2017
Equity, Class of Treasury Stock [Line Items]
Stock authorized to repurchase under stock repurchase program (in shares)				25,000,000	20,000,000
Shares repurchased during the period, value	$ 0	$ 100,000
Stock remaining to be purchased (in shares)	7,243,431		7,243,431
Restricted Stock Units
Equity, Class of Treasury Stock [Line Items]
Shares paid for tax withholding (in shares)	481,739	500,093
Cost related to tax withholding	$ 12,600	$ 11,400
Share Repurchase Program, October 2017
Equity, Class of Treasury Stock [Line Items]
Stock authorized to repurchase under stock repurchase program (in shares)	25,000,000	25,000,000	25,000,000		25,000,000
Shares repurchased during the period (in shares)	0	4,160,836	17,756,569
Shares repurchased during the period, value		$ 100,000	$ 468,700