Defined Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2017

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Schedule of Costs of Retirement Plans

The components of net periodic pension cost for the three and six months ended June 30, 2017 and 2016 are as follows (dollars in thousands):

	Pension Plans
	Three months ended June 30,						Six months ended June 30,
	2017			2016			2017			2016
Service costs	$	270		$	240		$	550		$	490
Interest costs	320			390			640			790
Expected return on plan assets	(360		)	(420		)	(730		)	(840		)
Amortization of net loss	250			250			500			480
Net periodic benefit cost	$	480		$	460		$	960		$	920