Pension and Other Postretirement Benefit Plans - Schedule of Changes in Accumulated Postemployment Benefit Obligations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Change in plan assets:
Fair value of plan assets at beginning of period	$ 549,571
Fair value of plan assets at end of period	511,472	$ 549,571
Funded status:
Salary Retirement	41,938	47,246
Pension Benefits
Change in benefit obligation:
Benefit obligation at beginning of period	525,086	524,212
Service cost	1,208	1,217	$ 1,207
Interest cost	25,724	27,027	16,539
Plan curtailments	(217)	0
Actuarial (gain) loss	(14,615)	14,061
Benefits and other payments	(45,522)	(41,431)
Benefit obligation at end of period	491,664	525,086	524,212
Change in plan assets:
Fair value of plan assets at beginning of period	549,571	540,225
Actual return on plan assets	5,695	49,239
Company contributions	1,728	1,538
Benefits and other payments	(45,522)	(41,431)
Fair value of plan assets at end of period	511,472	549,571	540,225
Funded status:
Salary Retirement	41,938	47,246
Current liabilities	(2,057)	(1,953)
Noncurrent liabilities	(20,073)	(20,808)
Net asset (obligation) recognized	19,808	24,485
Amounts recognized in accumulated other comprehensive (loss) income consist of:
Net actuarial loss (gain)	253,641	248,252
Prior service credit	0	0
Net amount recognized (before tax effect)	253,641	248,252
Other Postretirement Benefits
Change in benefit obligation:
Benefit obligation at beginning of period	227,235	255,029
Service cost	0	0	0
Interest cost	11,031	13,044	7,898
Plan curtailments	0	0
Actuarial (gain) loss	(27,445)	(20,776)
Benefits and other payments	(16,683)	(20,062)
Benefit obligation at end of period	194,138	227,235	255,029
Change in plan assets:
Fair value of plan assets at beginning of period	0	0
Actual return on plan assets	0	0
Company contributions	16,683	20,062
Benefits and other payments	(16,683)	(20,062)
Fair value of plan assets at end of period	0	0	$ 0
Funded status:
Salary Retirement	0	0
Current liabilities	(17,887)	(19,327)
Noncurrent liabilities	(176,251)	(207,908)
Net asset (obligation) recognized	(194,138)	(227,235)
Amounts recognized in accumulated other comprehensive (loss) income consist of:
Net actuarial loss (gain)	(53,416)	(26,249)
Prior service credit	(8,924)	(11,329)
Net amount recognized (before tax effect)	$ (62,340)	$ (37,578)