Pension and Other Postretirement Benefit Plans - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Expense due to settlement		$ 3,500
Adjustment to other comprehensive income, net of taxes	$ 0	0	$ 16
Adjustment to other comprehensive income, tax	$ 0	0	(6)
Assumed time horizon (years)	20 years
Other postretirement benefit plan assets	$ 549,571	540,225
Expected benefits payable	$ 10,932
United States Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage	100.00%
Non U.S. Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage	900.00%
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Expense due to settlement	$ 0	0	(22)
Decrease for remeasurement due to settlement	1,009
Adjustment to other comprehensive income, net of taxes	766
Adjustment to other comprehensive income, tax	265
Other postretirement benefit plan assets	549,571	540,225	733,966
Expected benefits payable	40,937
Pension Benefits | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Expected benefits payable	1,953
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Expense due to settlement	0	0	0
Other postretirement benefit plan assets	0	0	$ 0
Expected benefits payable	$ 19,327
Commodity Derivatives
Defined Benefit Plan Disclosure [Line Items]
Expense due to settlement		$ 22