Pension Benefit and Other Postretirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2014

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Components of net periodic benefit cost

The components of net periodic benefit cost (income) for the periods indicated are:

(Dollars in thousands)	Pension Benefits						Retirement Health and Life Insurance Benefits
	Three Months Ended						Three Months Ended
Change in benefit obligation:	March 31, 2014			March 31, 2013			March 31, 2014		March 31, 2013
Service cost	$	—		$	1,254		$	160	$	170
Interest cost	2,018			2,061			83		71
Expected return on plan assets	(3,227		)	(2,716		)	—		—
Amortization of prior service cost	—			93			—		(58		)
Amortization of net loss	183			1,476			31		83
Settlement charge	110			—			—		—
Net periodic benefit cost (income)	$	(916	)	$	2,168		$	274	$	266