Defined Benefit Plans (Tables)

3 Months Ended

Mar. 31, 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 months ended March 31, 2017 and 2016 are as follows (dollars in thousands):

	Pension Plans
	Three months ended March 31,
	2017			2016
Service costs	$	280		$	250
Interest costs	320			400
Expected return on plan assets	(370		)	(420		)
Amortization of net loss	250			230
Net periodic benefit cost	$	480		$	460