Employee Benefits (Tables)

3 Months Ended

Mar. 31, 2017

Compensation and Retirement Disclosure [Abstract]

Components of Net Periodic Pension Cost and Other Changes in Plan Assets and Benefit

The following table summarizes the components of net periodic pension cost for the periods presented:

	Three Months Ended March 31,
(dollars in thousands)	2017			2016
Components of Net Periodic Pension Cost
Service cost—benefits earned during the period	$	—		$	474
Interest cost on projected benefit obligation	1,025			1,065
Expected return on plan assets	(1,582		)	(1,459		)
Amortization of prior service credit	474			(35		)
Recognized net actuarial loss	—			544
Net Periodic Pension Expense	$	(83	)	$	589