Pension Benefits and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 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				Nine Months Ended				Three Months Ended				Nine Months Ended
	September 30,				September 30,				September 30,				September 30,
(Dollars in thousands)	2022		2021		2022		2021		2022		2021		2022		2021
Service cost	$	—	$	—	$	—	$	—	$	10	$	16	$	30	$	46
Interest cost	191		182		573		550		8		7		24		19
Expected return of plan assets	(340)		(389)		(1,020)		(1,169)		—		—		—		—
Amortization of prior service credit	—		—		—		—		—		(25)		—		(73)
Amortization of net loss	111		95		333		291		—		—		—		—
Net periodic benefit (credit) cost	$	(38)	$	(112)	$	(114)	$	(328)	$	18	$	(2)	$	54	$	(8)