Pension Benefits and Other Postretirement Benefit Plans (Tables)

6 Months Ended

Jun. 30, 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				Six Months Ended				Three Months Ended				Six Months Ended
	June 30,				June 30,				June 30,				June 30,
(Dollars in thousands)	2022		2021		2022		2021		2022		2021		2022		2021
Service cost	$	—	$	—	$	—	$	—	$	10	$	15	$	20	$	30
Interest cost	191		184		382		368		8		6		16		12
Expected return of plan assets	(340)		(390)		(680)		(780)		—		—		—		—
Amortization of prior service credit	—		—		—		—		—		(24)		—		(48)
Amortization of net loss	111		98		222		196		—		—		—		—
Net periodic benefit (credit) cost	$	(38)	$	(108)	$	(76)	$	(216)	$	18	$	(3)	$	36	$	(6)