Defined Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2022

Defined Benefit Plans And Other Postretirement Benefit Plans Disclosures [Abstract]

Schedule of Net Periodic Benefit Costs

The components of net periodic benefit costs from these defined benefit plans are as follows:

	Three Months Ended March 31,
(Dollars in thousands)	Pension Benefits						Other Benefits
	2022			2021			2022			2021
Service cost	$	42		$	33		$	4		$	1
Interest cost		46			40			17			2
Expected return on plan assets		(59	)		(57	)		—			—
Accretion of prior service cost		—			—			(5	)		(5	)
Amortization of net loss (gain)		(2	)		(49	)		4			—
Net periodic benefit expense (income)	$	27		$	(33	)	$	20		$	(2	)