PENSION BENEFIT PLANS - Defined Benefit Pension Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, at beginning of year	$ 32,805	$ 34,895
Service cost	333	341	$ 304
Interest cost	667	603	704
Benefits paid and other	(400)	(359)
Actuarial loss (gain)	2,205	(1,644)
Foreign exchange rate impact	1,976	(1,031)
Benefit obligation, at end of year	$ 37,586	$ 32,805	$ 34,895