Retirement Plans and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2022

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 September 30,
	2022		2021		2022		2021
(Dollars in thousands)	Retirement Plans				Other Post Retirement Benefits
Service cost	$	140	$	164	$	30	$	36
Interest cost	393		366		25		21
Expected loss on plan assets	(940)		(946)		—		—
Amortization of net actuarial loss	205		318		14		11
Net periodic benefit (income) cost	$	(202)	$	(98)	$	69	$	68

	Nine Months Ended September 30,
	2022		2021		2022		2021
(Dollars in thousands)	Retirement Plans				Other Post Retirement Benefits
Service cost	$	419	$	425	$	92	$	107
Interest cost	1,180		1,073		73		64
Expected loss on plan assets	(2,818)		(2,739)		—		—
Amortization of net actuarial loss	614		952		41		35
Net periodic benefit (income) cost	$	(605)	$	(289)	$	206	$	206