XML 69 R59.htm IDEA: XBRL DOCUMENT v3.23.3
Defined Benefit Post-Retirement Plans (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Defined Benefit Post-Retirement Plans [Abstract]        
Employer contributions $ 0 $ 0 $ 0 $ 0
Pension Benefits [Member]        
Components of net periodic cost (benefit) [Abstract]        
Service cost 476 506 1,440 1,574
Interest cost 999 690 3,019 2,078
Expected return on plan assets (1,844) (2,220) (5,550) (6,676)
Net amortization 669 183 2,009 553
Net periodic pension cost (benefit) 300 (841) 918 (2,471)
Other Benefits [Member]        
Components of net periodic cost (benefit) [Abstract]        
Service cost 1 2 3 6
Interest cost 56 42 168 124
Expected return on plan assets 0 0 0 0
Net amortization (21) 2 (63) 4
Net periodic pension cost (benefit) $ 36 $ 46 $ 108 $ 134