Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2026

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

The components of net periodic pension cost and net periodic benefit cost for the RAP and Postretirement Plan were as follows:

	Three Months Ended Mar 31,
(in thousands)	2026		2025
RAP
Service cost	$	869	$	810
Interest cost	2,749		2,814
Expected return on plan assets	(9,772)		(9,809)
Amortization of prior service cost	(44)		(44)
Total net periodic pension benefit	$	(6,198)	$	(6,230)
Postretirement Plan
Interest cost	$	22	$	26
Amortization of prior service cost	(19)		(19)
Amortization of actuarial loss (gain)	—		4
Total net periodic cost	$	3	$	12