Pension Benefits and Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 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				Six Months Ended				Three Months Ended				Six Months Ended
	June 30,				June 30,				June 30,				June 30,
(Dollars in thousands)	2023		2022		2023		2022		2023		2022		2023		2022
Service cost	$	—	$	—	$	—	$	—	$	19	$	10	$	38	$	20
Interest cost	268		191		536		382		17		8		34		16
Expected return of plan assets	(356)		(340)		(712)		(680)		—		—		—		—
Amortization of prior service credit	—		—		—		—		—		—		—		—
Amortization of net loss (gain)	122		111		244		222		(2)		—		(4)		—
Net periodic benefit (credit) cost	$	34	$	(38)	$	68	$	(76)	$	34	$	18	$	68	$	36