Benefit Plans - Development of Funded Status (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Pension and Supplemental Executive Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 229,474	$ 242,253
Benefit obligation	(229,474)	(242,253)	$ (261,330)
Plan assets at fair value	234,154	240,216	235,612
Funded Status - Overfunded/(Underfunded)	4,680	(2,037)
Other Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	22,765	23,383
Benefit obligation	(22,765)	(23,383)	(30,238)
Plan assets at fair value	182,436	156,604	$ 134,371
Funded Status - Overfunded/(Underfunded)	$ 159,671	$ 133,221