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v3.23.1

Employee Benefit Plans | 3 Months Ended
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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.

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