EMPLOYEE BENEFIT PLANS - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan [Abstract]
Service cost for benefits earned during the period	$ 207	$ 214	$ 636	$ 632
Interest cost on pension benefit obligation	3,179	3,230	9,764	9,530
Expected return on assets	(4,191)	(5,299)	(12,872)	(15,633)
Amortization of unrecognized losses	1,945	2,040	5,972	6,016
Net periodic pension cost	$ 1,140	$ 185	$ 3,500	$ 545