Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2022

Retirement Benefits [Abstract]

Net period benefit cost for the pension and postretirement plans

The components of net periodic pension cost and net periodic benefit cost for the RAP and Postretirement Plan for the three and nine months ended September 30, 2022 and 2021 were as follows:

	Three Months Ended Sep 30,				Nine Months Ended Sep 30,
($ in Thousands)	2022		2021		2022		2021
Components of Net Periodic Benefit Cost
RAP
Service cost	$	906	$	1,684	$	2,752	$	5,835
Interest cost	1,820		1,682		5,364		4,927
Expected return on plan assets	(6,706)		(6,395)		(20,177)		(19,256)
Amortization of prior service cost	(63)		(19)		(188)		(55)
Amortization of actuarial loss	347		1,346		494		3,446
Total net periodic pension cost	$	(3,696)	$	(1,701)	$	(11,754)	$	(5,103)
Postretirement Plan
Interest cost	$	13	$	13	$	40	$	39
Amortization of prior service cost	(19)		(19)		(56)		(56)
Total net periodic benefit cost	$	(6)	$	(6)	$	(17)	$	(17)