Defined Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2019

Defined Benefit Pension Plans And Defined Benefit Postretirement Plans Disclosure [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
	2019			2018		2019			2018
Service cost	$	36		$	9	$	1		$	1
Interest cost		65			9		4			4
Expected return on plan assets		(63	)		—		—			—
Amortization (accretion) of prior service cost		—			4		(5	)		(5	)
Amortization of net (gain) or loss		(15	)		—		(1	)		—
Net periodic benefit expense (income)	$	23		$	22	$	(1	)	$	—

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, amortization (accretion) of prior service cost, and amortization of (gain) loss are reported as a component of other income.