Pension and Other Postretirement Benefit Plans - Schedule of Net Benefit Cost (Credit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,100	$ 1,208	$ 1,217
Interest cost	25,373	25,724	27,027
Expected return on plan assets	(30,258)	(31,964)	(39,470)
Amortization of prior service credits	0	0	0
Recognized net actuarial loss (gain)	8,633	6,265	741
Curtailment gain recognized	0	(217)	0
Net periodic benefit cost (credit)	4,848	1,016	(10,485)
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	146	0	0
Interest cost	11,876	11,031	13,044
Expected return on plan assets	0	0	0
Amortization of prior service credits	(2,405)	(2,405)	(2,405)
Recognized net actuarial loss (gain)	(2,734)	(278)	0
Curtailment gain recognized	0	0	0
Net periodic benefit cost (credit)	$ 6,883	$ 8,348	$ 10,639