Retirement Plans and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2014

Compensation and Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Cost (Income)

Components of net periodic benefit cost (income) were as follows:

	Three Months Ended September 30,
	2014			2013			2014			2013
(Dollars in thousands)	Retirement Plans						Other Post Retirement Benefits
Service cost	$	137		$	155		$	19		$	23
Interest cost	476			427			32			30
Expected return on plan assets	(746		)	(630		)	—			—
Amortization of net actuarial loss	164			314			4			6
Accretion of prior service cost	(71		)	(58		)	(1		)	(6		)
Net periodic benefit (income) cost	$	(40	)	$	208		$	54		$	53

	Nine Months Ended September 30,
	2014			2013			2014			2013
(Dollars in thousands)	Retirement Plans						Other Post Retirement Benefits
Service cost	$	410		$	466		$	56		$	69
Interest cost	1,426			1,284			99			86
Expected return on plan assets	(2,236		)	(1,894		)	—			—
Amortization of net actuarial loss	490			943			9			18
Accretion of prior service cost	(212		)	(176		)	(4		)	(15		)
Net periodic benefit (income) cost	$	(122	)	$	623		$	160		$	158