Employee Benefits (Tables)

9 Months Ended

Sep. 30, 2015

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 September 30,						Nine Months Ended September 30,
(dollars in thousands)	2015			2014			2015			2014
Components of Net Periodic Pension Cost
Service cost—benefits earned during the period	$	606		$	516		$	1,951		$	1,778
Interest cost on projected benefit obligation	1,120			1,141			3,319			3,353
Expected return on plan assets	(1,772		)	(1,710		)	(5,385		)	(5,180		)
Amortization of prior service (credit) cost	(34		)	(34		)	(104		)	(104		)
Recognized net actuarial loss	586			287			1,521			705
Net Periodic Pension Expense	$	506		$	200		$	1,302		$	552