Retirement Plans and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2023

Retirement Benefits [Abstract]

Components of Net Periodic Benefit Cost (Income)

Information with respect to the Retirement Plans and Other Postretirement Benefits follows: 

	Three Months Ended March 31,
	2023		2022		2023		2022
(Dollars in thousands)	Retirement Plans				Other Post Retirement Benefits
Service cost	$	130	$	137	$	19	$	30
Interest cost	597		390		32		24
Expected loss on plan assets	(770)		(933)		—		—
Amortization of net actuarial loss (gain)	250		204		(4)		14
Net periodic benefit cost (income)	$	207	$	(202)	$	47	$	68