Defined Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2012

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 and six months ended June 30, 2012 and 2011 are as follows:

	Pension Plans												Other Postretirement Benefits
	Three months ended June 30,						Six months ended June 30,						Three months ended June 30,						Six months ended June 30,
	2012			2011			2012			2011			2012			2011			2012			2011
	(dollars in thousands)
Service costs	$	150		$	160		$	300		$	320		$	—		$	—		$	—		$	—
Interest costs	400			400			800			800			10			10			20			20
Expected return on plan assets	(420		)	(410		)	(850		)	(810		)	—			—			—			—
Amortization of prior service cost	10			10			10			10			(60		)	(60		)	(130		)	(130		)
Amortization of net (gain)/loss	260			170			530			350			(20		)	(20		)	(40		)	(40		)
Net periodic benefit cost	$	400		$	330		$	790		$	670		$	(70	)	$	(70	)	$	(150	)	$	(150	)