Defined Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2019

Defined Benefit Plan [Abstract]

Schedule of Costs of Retirement Plans

The components of net periodic pension cost are as follows (dollars in thousands):

	Pension Plans
	Three months ended June 30,						Six months ended June 30,
	2019			2018			2019			2018
Service costs	$	260		$	280		$	520		$	580
Interest costs	270			290			540			590
Expected return on plan assets	(350		)	(420		)	(700		)	(850		)
Settlement/curtailment loss	—			2,500			—			2,500
Amortization of net loss	150			240			290			490
Net periodic benefit cost	$	330		$	2,890		$	650		$	3,310