Defined Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2014

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, 2014 and 2013 are as follows:

	Pension Plans						Other Postretirement Benefits
	Three months ended March 31,						Three months ended March 31,
	2014			2013			2014			2013
	(dollars in thousands)
Service costs	$	190		$	180		$	—		$	—
Interest costs	440			410			10			10
Expected return on plan assets	(520		)	(460		)	—			—
Amortization of net (gain)/loss	280			320			(20		)	(20		)
Net periodic benefit cost	$	390		$	450		$	(10	)	$	(10	)