PENSION BENEFIT PLANS - Schedule of Net Periodic Pension Costs of Noncontributory Defined Benefit Pension Plans (Details) - Pension Plan - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 103	$ 49	$ 268	$ 98
Interest cost	199	75	520	150
Amortization of net loss		(80)	0	(160)
Net periodic pension cost	$ 302	$ 204	$ 788	$ 408