EMPLOYEE BENEFIT PLANS - Activity in Liability Classified Shares (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Liability Classified Awards Settleable in Shares
Beginning balance	$ 21,676	$ 15,493	$ 12,743
Offer to grant	6,410	12,432	9,637
Share price determined-converted to cash payments	(100)	(300)	(6,040)
Share price determined-transferred to equity grants	(6,457)	(4,705)	0
Forfeited	(540)	(1,244)	(847)
Ending balance	$ 20,989	$ 21,676	$ 15,493
Share price determined-transferred to equity grants (in shares)	134,370	96,778	0