Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2020

Defined Benefit Plan [Abstract]

Schedule of Net Benefit Costs

The components of net periodic benefit cost for the Defined Benefit Pension Plan were as follows (in thousands):

	Three Months Ended March 31,
	2020			2019
Service cost	$	1,353		$	1,346
Interest cost	3,357			4,343
Expected return on plan assets	(5,648		)	(6,100		)
Prior service cost (benefit)	—			6
Net loss (gain)	2,093			941
Net periodic benefit cost	$	1,155		$	536

Defined Benefit Postretirement Healthcare Plan

The components of net periodic benefit cost for the Defined Benefit Postretirement Healthcare Plan were as follows (in thousands):

	Three Months Ended March 31,
	2020			2019
Service cost	$	514		$	454
Interest cost	412			560
Expected return on plan assets	(45		)	(57		)
Prior service cost (benefit)	(137		)	(99		)
Net loss (gain)	5			—
Net periodic benefit cost	$	749		$	858

Supplemental Non-qualified Defined Benefit and Defined Contribution Plans

The components of net periodic benefit cost for the Supplemental Non-qualified Defined Benefit and Defined Contribution Plans were as follows (in thousands):

	Three Months Ended March 31,
	2020			2019
Service cost	$	(1,370	)	$	1,285
Interest cost	275			324
Net loss (gain)	426			134
Net periodic benefit cost	$	(669	)	$	1,743

Schedule of Defined Benefit Plans Contributions

Contributions made in the first quarter of 2020 and anticipated contributions for 2020 and 2021 are as follows (in thousands):

	Contributions Made		Additional Contributions		Contributions
	Three Months Ended March 31, 2020		Anticipated for 2020		Anticipated for 2021
Defined Benefit Pension Plan	$	—	$	12,700	$	12,700
Non-pension Defined Benefit Postretirement Healthcare Plans	$	1,335	$	4,006	$	5,364
Supplemental Non-qualified Defined Benefit and Defined Contribution Plans	$	355	$	1,065	$	1,614