Defined Benefit Plans (Tables)

6 Months Ended

Jun. 30, 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 and six months ended June 30, 2014 and 2013 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,
	2014			2013			2014			2013			2014			2013			2014			2013
	(dollars in thousands)
Service costs	$	190		$	170		$	380		$	350		$	—		$	—		$	—		$	—
Interest costs	440			410			880			820			10			10			20			20
Expected return on plan assets	(520		)	(460		)	(1,040		)	(920		)	—			—			—			—
Amortization of prior service cost	10			10			10			10			—			—			—			—
Amortization of net (gain)/loss	280			320			560			640			(30		)	(20		)	(50		)	(40		)
Net periodic benefit cost	$	400		$	450		$	790		$	900		$	(20	)	$	(10	)	$	(30	)	$	(20	)