Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2026

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

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

	Three Months Ended Jun 30,				Six Months Ended Jun 30,
(in thousands)	2026		2025		2026		2025
RAP
Service cost	$	869	$	810	$	1,737	$	1,619
Interest cost	2,749		2,814		5,499		5,628
Expected return on plan assets	(9,772)		(9,809)		(19,544)		(19,619)
Amortization of prior service credit	(44)		(44)		(89)		(89)
Total net periodic pension benefit	$	(6,198)	$	(6,230)	$	(12,397)	$	(12,460)
Postretirement Plan
Interest cost	$	22	$	26	$	43	$	53
Amortization of prior service credit	(19)		(19)		(38)		(38)
Amortization of actuarial loss	—		4		—		8
Total net periodic cost	$	3	$	12	$	6	$	23