Employee and Retiree Benefit Plans - Amounts Included in Accumulated Other Comprehensive Income Not Recognized in Net Periodic Benefit Expense (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial gain (loss)	$ (202,868)
Prior service (credit) cost	(20,561)
Amounts included in accumulated other comprehensive loss which have not been recognized in net periodic benefit expense	(223,429)
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial gain (loss)	44,165
Prior service (credit) cost	3,937
Amounts included in accumulated other comprehensive loss which have not been recognized in net periodic benefit expense	$ 48,102