Pension Benefits and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2023

Retirement Benefits [Abstract]

Schedule of Components of Net Periodic Benefit Cost

The components of net periodic benefit (credit) cost were as follows:

	Pension Benefits								Other Postretirement Benefits
	Three Months Ended				Nine Months Ended				Three Months Ended				Nine Months Ended
	September 30,				September 30,				September 30,				September 30,
(Dollars in thousands)	2023		2022		2023		2022		2023		2022		2023		2022
Service cost	$	—	$	—	$	—	$	—	$	19	$	10	$	57	$	30
Interest cost	263		191		799		573		17		8		51		24
Expected return of plan assets	(354)		(340)		(1,066)		(1,020)		—		—		—		—
Amortization of prior service credit	—		—		—		—		—		—		—		—
Amortization of net loss (gain)	116		111		360		333		(3)		—		(7)		—
Net periodic benefit (credit) cost	$	25	$	(38)	$	93	$	(114)	$	33	$	18	$	101	$	54