EMPLOYEE BENEFIT PLANS (Tables)

6 Months Ended

Sep. 30, 2016

Compensation And Retirement Disclosure [Abstract]

Schedule of Carrying Value of Trust Assets, Including Unrealized Gains or Losses

The following table summarizes the carrying value of the trust assets, including unrealized gains or losses at September 30, 2016 and March 31, 2016:

	September 30,		March 31,
(In thousands)	2016		2016
Investments held in Rabbi Trust	$	8,896		8,811
Unrealized losses in fair value of trust assets		72		(208	)
Unrealized losses in fair value of trust assets are net of income tax expense of		—		(168	)
Obligations under the supplemental plan		25,739		25,072

Schedule of Net Periodic Benefit Cost

The net periodic benefit cost for the company’s defined benefit pension plans and supplemental plan (referred to collectively as “Pension Benefits”) and the postretirement health care and life insurance plan (referred to collectively as “Other Benefits”) is comprised of the following components:

	Quarter Ended						Six Months Ended
	September 30,						September 30,
(In thousands)	2016			2015			2016			2015
Pension Benefits:
Service cost	$	254			234			506			468
Interest cost		941			935			1,882			1,870
Expected return on plan assets		(548	)		(530	)		(1,097	)		(1,060	)
Administrative expenses		2			—			4			—
Amortization of prior service cost		—			9			—			18
Recognized actuarial loss		446			567			892			1,134
Net periodic benefit cost	$	1,095			1,215			2,187			2,430
Other Benefits:
Service cost	$	20			75			40			150
Interest cost		50			211			100			421
Amortization of prior service cost		(1,086	)		(510	)		(2,172	)		(1,021	)
Recognized actuarial benefit		(285	)		(245	)		(570	)		(489	)
Net periodic benefit cost	$	(1,301	)		(469	)		(2,602	)		(939	)