EMPLOYEE BENEFIT PLANS (Tables)

9 Months Ended

Dec. 31, 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 December 31, 2016 and March 31, 2016:

	December 31,			March 31,
(In thousands)	2016			2016
Investments held in Rabbi trust	$	8,697			8,811
Unrealized losses in fair value of trust assets		(1	)		(208	)
Unrealized losses in fair value of trust assets are net of income tax expense of		—			(168	)
Obligations under the supplemental plan		26,043			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						Nine Months Ended
	December 31,						December 31,
(In thousands)	2016			2015			2016			2015
Pension Benefits:
Service cost	$	257			234			763			702
Interest cost		941			935			2,823			2,805
Expected return on plan assets		(548	)		(530	)		(1,645	)		(1,590	)
Administrative expenses		2			—			6			—
Amortization of prior service cost		—			9			—			27
Recognized actuarial loss		446			567			1,338			1,701
Net periodic benefit cost	$	1,098			1,215			3,285			3,645
Other Benefits:
Service cost	$	20			41			60			191
Interest cost		50			103			150			524
Amortization of prior service cost		(1,086	)		(899	)		(3,258	)		(1,920	)
Recognized actuarial benefit		(285	)		(281	)		(855	)		(770	)
Net periodic benefit cost	$	(1,301	)		(1,036	)		(3,903	)		(1,975	)