Accumulated Other Comprehensive Income (Loss) (Reclassifications out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net of tax	$ (1,863)	$ (882)	$ (5,628)	$ (6,131)
Amortization of actuarial losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification	(557)	(724)	(1,707)	(2,033)
Prior service costs
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification	(154)	(158)	(467)	(464)
Pension and other postretirement effects
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax benefit (expense)	373	23	1,119	(26)
Net of tax	(1,838)	(859)	(5,555)	(2,523)
Cash flow hedging activity
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification	(32)	(30)	(94)	(92)
Tax benefit (expense)	7	7	21	50
Net of tax	(25)	(23)	(73)	(42)
Accumulated Defined Benefit Plans Adjustment, Net Settlement Gain (Loss) Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification	$ (1,500)	$ 0	$ (4,500)	$ 0