Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2025

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 Sep 30,				Nine Months Ended Sep 30,
(in thousands)	2025		2024		2025		2024
RAP
Service cost	$	636	$	508	$	2,255	$	2,263
Interest cost	3,027		2,943		8,655		8,380
Expected return on plan assets	(9,832)		(8,649)		(29,450)		(25,949)
Amortization of prior service cost	(44)		(54)		(133)		(161)
Total net periodic pension cost	$	(6,213)	$	(5,252)	$	(18,673)	$	(15,467)
Postretirement Plan
Interest cost	$	26	$	18	$	78	$	54
Amortization of prior service cost	(19)		(19)		(56)		(56)
Amortization of actuarial loss (gain)	4		(7)		12		(21)
Total net periodic benefit (cost)	$	11	$	(8)	$	34	$	(23)