Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Jun. 30, 2021

Retirement Benefits [Abstract]

Schedule of Net Periodic Benefit Cost

The following summarizes the net periodic pension cost for the defined benefit pension plans:

	Defined Benefit Plans
	Successor		Predecessor
	Three months ended June 30, 2021		Three months ended June 30, 2020
Operating expenses:
Service cost	$	99	$	106
Interest expense:
Interest expense	677		957
Expected return on plan assets	(728)		(740)
Amortization of prior service cost	(1)		10
Actuarial loss	4		521
Net periodic pension cost	$	51	$	854

The following summarizes the net periodic pension cost (income) for the postretirement health and life insurance benefits plans:

	Other Postretirement Benefits
	Successor		Predecessor
	Three months ended June 30, 2021		Three months ended June 30, 2020
Operating expenses:
Service cost	$	2	$	2
Interest expense:
Interest expense	49		69
Amortization of prior service cost	—		(176)
Actuarial loss	(3)		94
Net periodic benefit cost (income)	$	48	$	(11)

Schedule of Contributions to Pensions Plans and Postretirement Health and Life Insurance Benefits

The following summarizes contributions to pension plans and postretirement health and life insurance benefits:

	Successor		Predecessor
	Three months ended June 30, 2021		Three months ended June 30, 2020
Contributions made during the period	$	1,503	$	875
Contributions expected for the remainder of the fiscal year	4,368		6,306
Total	$	5,871	$	7,181