Benefit Plans - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension and Supplemental Executive Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Net Actuarial (Gain)/Loss	$ 78,240	$ 79,309
Net Prior Service Cost/(Credit)	2,555	2,900
Net Transition Obligation/(Asset)	0	0
Total at Year End	80,795	82,209	$ 92,956
Other Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Net Actuarial (Gain)/Loss	(45,384)	(30,804)
Net Prior Service Cost/(Credit)	2,923	11,041
Net Transition Obligation/(Asset)	0	0
Total at Year End	$ (42,461)	$ (19,763)	$ (532)