Employee Benefit Plans

3 Months Ended

Mar. 31, 2023

Retirement Benefits [Abstract]

Employee Benefit Plans

Employee Benefit Plans

We sponsor a noncontributory defined benefit pension plan and non-qualified Supplemental Executive Retirement Plans ("SERPs"). The accrual for future benefits has been frozen in our defined benefit pension plan and SERPs.

We sponsor a defined contribution plan covering substantially all non-union and certain union employees. We match a portion of employees' voluntary contributions to this plan.

Other union-represented employees are covered by defined benefit pension plans jointly sponsored by us and the union, or by union-sponsored multi-employer plans.

The components of the employee benefit plan expense consisted of the following:

	Three Months Ended  March 31,
(in thousands)	2023		2022
Interest cost	$	5,935	$	4,333
Expected return on plan assets, net of expenses	(6,306)		(6,224)
Amortization of actuarial loss and prior service cost	5		1,014
Total for defined benefit pension plan	(366)		(877)
SERPs	232		214
Defined contribution plan	4,429		4,453
Net periodic benefit cost	$	4,295	$	3,790

We contributed $0.2 million to fund current benefit payments for our SERPs during the three months ended March 31, 2023. During the remainder of 2023, we anticipate contributing an additional $1.2 million to fund the SERPs' benefit payments. We have met regulatory funding requirements for our qualified benefit pension plan and do not have a mandatory contribution in 2023.