v3.25.2
PENSION AND OTHER POSTRETIREMENT BENEFITS - Pension Benefits - Net Periodic Pension Cost/(Income) (Details) - Pension Plan - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Pension Benefits        
Service cost $ 1,661 $ 1,541 $ 3,322 $ 3,082
Interest cost 15,293 15,582 30,587 31,165
Expected return on plan assets (15,282) (18,109) (30,564) (36,218)
Amortization of actuarial loss 4,892 3,600 9,783 7,200
Amortization of prior service credit (486) (486) (972) (972)
Effect of settlement 0 (27) 0 (27)
Net periodic pension cost/ (income) or postretirement benefit cost 6,078 2,101 12,156 4,230
Qualified Plans        
Pension Benefits        
Service cost 1,661 1,541 3,322 3,082
Interest cost 13,217 13,376 26,434 26,752
Expected return on plan assets (15,282) (18,109) (30,564) (36,218)
Amortization of actuarial loss 4,026 2,603 8,052 5,206
Amortization of prior service credit (486) (486) (972) (972)
Effect of settlement 0 0 0 0
Net periodic pension cost/ (income) or postretirement benefit cost 3,136 (1,075) 6,272 (2,150)
Non- Qualified Plans        
Pension Benefits        
Service cost 0 0 0 0
Interest cost 2,076 2,206 4,153 4,413
Expected return on plan assets 0 0 0 0
Amortization of actuarial loss 866 997 1,731 1,994
Amortization of prior service credit 0 0 0 0
Effect of settlement 0 (27) 0 (27)
Net periodic pension cost/ (income) or postretirement benefit cost $ 2,942 $ 3,176 $ 5,884 $ 6,380