Defined Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2013

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

Schedule of Costs of Retirement Plans

The components of net periodic pension and postretirement benefit costs for the three months ended March 31, 2013 and 2012 are as follows:

	Pension Plans						Other Postretirement Benefits
	Three months ended March 31,						Three months ended March 31,
	2013			2012			2013			2012
	(dollars in thousands)
Service costs	$	180		$	150		$	—		$	—
Interest costs	410			400			10			10
Expected return on plan assets	(460		)	(430		)	—			—
Amortization of prior service cost	—			—			—			(70		)
Amortization of net (gain)/loss	320			270			(20		)	(20		)
Net periodic benefit cost	$	450		$	390		$	(10	)	$	(80	)