Pension Benefits and Other Postretirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2022

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				Three Months Ended
	March 31,				March 31,
(Dollars in thousands)	2022		2021		2022		2021
Service cost	$	—	$	—	$	10	$	15
Interest cost	191		184		8		6
Expected return of plan assets	(340)		(390)		—		—
Amortization of prior service credit	—		—		—		(24)
Amortization of net loss	111		98		—		—
Net periodic benefit (credit) cost	$	(38)	$	(108)	$	18	$	(3)