Defined Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2021

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
	2021			2020			2021			2020
Service cost	$	33		$	20		$	1		$	—
Interest cost		40			45			2			—
Expected return on plan assets		(57	)		(68	)		—			—
Accretion of prior service cost		—			—			(5	)		(5	)
Settlement gain		(49	)		—			—			—
Net periodic benefit income	$	(33	)	$	(3	)	$	(2	)	$	(5	)

Service costs are reported as a component of salaries and employee benefits on the Consolidated Statements of Income, while interest costs, expected return on plan assets and amortization (accretion) of prior service cost are reported as a component of other income.