Benefit Plans - Change in Project Benefit/Accumulated Benefit Obligations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension and Supplemental Executive Retirement Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Year	$ 261,330	$ 274,975
Company Service Cost	0	0	$ 7,153
Interest Cost	12,988	13,787	12,461
Plan Participants' Contributions	0	0
Net Actuarial (Gain)/Loss	(8,637)	16,995
Benefit Payments from Fund	(13,985)	(13,549)
Benefit and Settlement Payments Paid Directly by Company	(313)	(384)
Plan Amendments	0	0
Settlement Payments from Fund (1)	(9,130)	(30,494)
Other Adjustment	0	0
Benefit Obligation at End of Year	242,253	261,330	274,975
Other Postretirement Benefit Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Year	30,238	29,580
Company Service Cost	1,668	1,497	1,307
Interest Cost	1,501	1,633	694
Plan Participants' Contributions	240	311
Net Actuarial (Gain)/Loss	(379)	1,294
Benefit Payments from Fund	(3,296)	(3,439)
Benefit and Settlement Payments Paid Directly by Company	0	0
Plan Amendments	(6,305)	(346)
Settlement Payments from Fund (1)	0	0
Other Adjustment	(284)	(292)
Benefit Obligation at End of Year	$ 23,383	$ 30,238	$ 29,580