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Pension and Other Postretirement Employee Benefits
 3 Months Ended
Mar. 31, 2025
Retirement Benefits, Description [Abstract]  
Pension and Other Postretirement Employee Benefits

NOTE 11. PENSION AND OTHER POSTRETIREMENT EMPLOYEE BENEFITS

The following table details the components of net periodic cost (benefit) of our pension plans and other postretirement employee benefit plans (OPEB):

 

 

 

Three Months Ended March 31,

 

 

 

Pension

 

 

OPEB

 

(in thousands)

 

2025

 

 

2024

 

 

2025

 

 

2024

 

Service cost

 

$

1,266

 

 

$

1,321

 

 

$

14

 

 

$

23

 

Interest cost

 

 

3,228

 

 

 

3,123

 

 

 

252

 

 

 

219

 

Expected return on plan assets

 

 

(2,932

)

 

 

(3,237

)

 

 

—

 

 

 

—

 

Amortization of prior service cost

 

 

—

 

 

 

5

 

 

 

—

 

 

 

—

 

Amortization of actuarial (gain) loss

 

 

43

 

 

 

20

 

 

 

(240

)

 

 

(331

)

Total net periodic cost

 

$

1,605

 

 

$

1,232

 

 

$

26

 

 

$

(89

)

 

 

Funding of our non-qualified pension and other postretirement employee benefit plans was $0.9 million for both the three months ended March 31, 2025 and 2024. During the three months ended March 31, 2025 and 2024, we made contributions to our qualified pension benefit plan of $0.7 million and $0, respectively.