Benefit Plans - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Pension
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	$ 31,227	$ 45,746
Prior service cost	180	216
Deferred tax (benefit) expense	(8,630)	(12,697)
Total	22,777	33,265
OPEB
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	(749)	(988)
Prior service cost	0	0
Deferred tax (benefit) expense	206	273
Total	$ (543)	$ (715)