Retirement Plans and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2024

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,
	2024		2023		2024		2023
(Dollars in thousands)	Retirement Plans				Other Post Retirement Benefits
Service cost	$	148	$	130	$	14	$	19
Interest cost	592		597		27		32
Expected loss on plan assets	(871)		(770)		—		—
Amortization of net actuarial loss (gain)	175		250		(28)		(4)
Net periodic benefit cost	$	44	$	207	$	13	$	47