Employee Benefits (Tables)

3 Months Ended

Mar. 31, 2016

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)	2016			2015
Components of Net Periodic Pension Cost
Service cost—benefits earned during the period	$	474		$	672
Interest cost on projected benefit obligation	1,065			1,100
Expected return on plan assets	(1,459		)	(1,807		)
Amortization of prior service credit	(35		)	(35		)
Recognized net actuarial loss	544			468
Net Periodic Pension Expense	$	589		$	398