Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2018

Retirement Plans

Schedule of components of net periodic pension expense

	Three Months Ended
(Dollars in thousands)	2018		2017
Interest cost	$	270	$	281
Service cost		19		31
Expected return on plan assets		(582)		(553)
Recognized net actuarial loss		194		188
Net periodic pension benefit	$	(99)	$	(53)