PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Tables)

9 Months Ended

Dec. 31, 2019

Pension Plan [Member]

Components of net periodic benefit costs:

Schedule of components of net periodic benefit cost and postretirement benefit plan

	Pension Benefits
	Three Months Ended December 31,						Nine Months Ended December 31,
	2019			2018			2019			2018
Components of net periodic benefit costs:
Service cost	$	577		$	822		$	1,758		$	2,476
Interest cost	16,073			19,905			52,162			59,736
Expected return on plan assets	(35,210		)	(37,065		)	(106,566		)	(111,246		)
Amortization of prior service credits	(183		)	(907		)	(695		)	(2,722		)
Amortization of net loss	7,752			4,179			19,444			12,538
Curtailment loss	—			—			23,476			—
Special termination benefits	—			—			11,642			—
Net periodic benefit (income) expense	$	(10,991	)	$	(13,066	)	$	1,221		$	(39,218	)

Other postretirement

Components of net periodic benefit costs:

Schedule of components of net periodic benefit cost and postretirement benefit plan

	Other Postretirement Benefits
	Three Months Ended December 31,						Nine Months Ended December 31,
	2019			2018			2019			2018
Components of net periodic benefit costs:
Service cost	$	—		$	57		$	62		$	170
Interest cost	41			1,010			1,519			3,029
Amortization of prior service credits	(1,276		)	(1,164		)	(3,596		)	(3,491		)
Amortization of gain	(1,186		)	(2,463		)	(5,175		)	(7,389		)
Curtailment gain	—			—			(49,491		)	—
Net periodic benefit income	$	(2,421	)	$	(2,560	)	$	(56,681	)	$	(7,681	)