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Benefit Plans - Schedule of Net Benefit Costs (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 1,892 $ 2,397 $ 5,676 $ 7,191
Interest cost 3,557 2,642 10,672 7,925
Expected return on assets (3,442) (4,823) (11,580) (14,469)
Unrecognized actuarial loss 554 1,257 1,662 3,772
Amortization of prior service cost 4 4 11 12
Total 2,565 1,477 6,441 4,431
Other Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 160 255 480 765
Interest cost 317 218 951 656
Expected return on assets (217) (221) (651) (663)
Unrecognized actuarial loss (87) (75) (263) (226)
Amortization of prior service cost 0 0 0 0
Total $ 173 $ 177 $ 517 $ 532