OTHER COMPREHENSIVE (LOSS) INCOME - Components Reclassified from AOCI to Earnings (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Reclassification Out Of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from accumulated other comprehensive loss to net income, gross	$ (367)	$ (459)	$ (1,099)	$ (1,376)
Tax effects of amounts reclassified from accumulated other comprehensive loss to net income	(82)	0	(246)	0
Amounts reclassified from accumulated other comprehensive loss to net income, net	285	459	853	1,376
Actuarial loss
Reclassification Out Of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from accumulated other comprehensive loss to net income, gross	(534)	(626)	(1,601)	(1,878)
Amortization of prior service cost
Reclassification Out Of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from accumulated other comprehensive loss to net income, gross	$ 167	$ 167	$ 502	$ 502