Defined Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2021

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [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,
	2021		2020		2021		2020
Service costs	$	320	$	310	$	650	$	630
Interest costs	200		230		400		470
Expected return on plan assets	(390)		(360)		(780)		(730)
Amortization of net loss	230		230		460		450
Net periodic benefit cost	$	360	$	410	$	730	$	820