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Postretirement Benefit Obligations - Schedule of Defined Benefit Plans Disclosure (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Change in benefit obligation:                              
Benefit obligation at beginning balance       $ 93,270       $ 80,174       $ 91,389 $ 93,270 $ 80,174 $ 91,389
Service Cost                         4,877 4,906 6,860
Interest Cost                         4,524 4,048 2,436
Actuarial losses (gains)                         (12,285) 6,636 (18,665)
Benefits Paid                         (3,098) (2,494) (1,846)
Benefit obligation at ending balance $ 87,288       $ 93,270       $ 80,174       87,288 93,270 80,174
Change in plan assets:                              
Fair value of plan assets at beginning balance       86,084       77,362       71,252 86,084 77,362 71,252
Actual return on plan assets                         6,053 11,216 (12,044)
Benefits paid                         (3,098) (2,494) (1,846)
Company Contributions 0 $ 0 $ 0 $ 0 0 $ 0 $ 0 $ 0 5,000 $ 5,000 $ 10,000 $ 0 0 0 20,000
Fair value of plan assets at ending balance 89,039       86,084       77,362       89,039 86,084 77,362
Under (Over)-Funded status of plan (1,751)       7,186       2,812       (1,751) 7,186 2,812
Accrued pension liabilities-current 0       3,526       2,812       0 3,526 2,812
Accrued pension liabilities-noncurrent 0       3,660       0       0 3,660 0
Pension asset-noncurrent (1,751)       0       0       (1,751) 0 0
Total pension liabilities (assets) recognized $ (1,751)       $ 7,186       $ 2,812       $ (1,751) $ 7,186 $ 2,812