PENSION BENEFIT PLANS - Net Periodic Pension Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Retirement Benefits [Abstract]
Service cost	$ 45	$ 61	$ 131	$ 187
Interest cost	105	118	307	362
Net periodic pension cost	$ 150	$ 179	$ 438	$ 549