XML 52 R42.htm IDEA: XBRL DOCUMENT v3.24.3
Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Defined Benefit Plan Disclosure [Line Items]        
Service cost, net $ 4,437 $ 3,754 $ 13,143 $ 11,154
Interest cost on projected benefit obligations 5,702 6,228 16,947 18,546
Expected return on plan assets (10,762) (10,129) (31,893) (30,107)
Recognition of prior service cost (1,185) (1,093) (3,504) (3,241)
Recognition of actuarial losses/(gains) 4,311 3,139 12,767 9,332
Net periodic pension cost/(credit) 2,503 1,899 7,460 5,684
Pension Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost, net 397 287 1,191 866
Interest cost on projected benefit obligations 1,192 1,256 3,575 3,767
Expected return on plan assets (1,368) (1,383) (4,104) (4,149)
Recognition of prior service cost 0 0 0 0
Recognition of actuarial losses/(gains) 521 548 1,562 1,644
Net periodic pension cost/(credit) 742 708 2,224 2,128
Other Pension Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost, net 4,040 3,467 11,952 10,288
Interest cost on projected benefit obligations 4,503 4,965 13,352 14,757
Expected return on plan assets (9,394) (8,746) (27,789) (25,958)
Recognition of prior service cost (1,167) (1,074) (3,448) (3,184)
Recognition of actuarial losses/(gains) 3,782 2,591 11,181 7,689
Net periodic pension cost/(credit) 1,764 1,203 5,248 3,592
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year, Description 27,300   27,300  
Other Postretirement Benefits Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost, net 0 0 0 0
Interest cost on projected benefit obligations 7 7 20 22
Expected return on plan assets 0 0 0 0
Recognition of prior service cost (18) (19) (56) (57)
Recognition of actuarial losses/(gains) 8 0 24 (1)
Net periodic pension cost/(credit) $ (3) $ (12) $ (12) $ (36)