v3.25.2
Employee Benefit Plans - Schedule of Net Periodic Costs (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Pension Benefits        
Components of Net Periodic Benefits Cost:        
Service cost $ 668 $ 850 $ 1,442 $ 1,700
Interest cost 2,676 2,550 5,382 5,100
Expected return on plan assets (3,179) (3,009) (6,362) (6,018)
Amortization of prior service cost 110 109 218 217
Amortization of actuarial (gain) loss 0 0 0 0
Net periodic benefits costs under accounting standards 275 500 680 999
Other Postretirement Benefits        
Components of Net Periodic Benefits Cost:        
Service cost 27 32 54 64
Interest cost 21 26 45 49
Expected return on plan assets (161) (142) (322) (284)
Amortization of prior service cost 0 0 0 0
Amortization of actuarial (gain) loss (292) (293) (583) (556)
Net periodic benefits costs under accounting standards (405) (377) (806) (727)
SERP        
Components of Net Periodic Benefits Cost:        
Service cost 180 358 361 716
Interest cost 485 426 970 852
Expected return on plan assets 0 0 0 0
Amortization of prior service cost 0 0 0 0
Amortization of actuarial (gain) loss 0 (3) 0 (7)
Net periodic benefits costs under accounting standards $ 665 $ 781 $ 1,331 $ 1,561