Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2012

Benefit Plans [Abstract]

Net periodic postretirement benefit cost

Net periodic postretirement benefit cost for the nine- and three-month periods ended September 30, 2012 and 2011 includes the following components.

	Nine months ended September 30, (Dollars in thousands)
	2012		2011
Components of net periodic cost:
Service cost	$	6	$	6
Interest cost		27		27
Amortization of (gain) loss		9		—
Net periodic postretirement benefit cost	$	42	$	33
	Three months ended September 30, (Dollars in thousands)
	2012		2011
Components of net periodic cost:
Service cost	$	2	$	2
Interest cost		9		9
Amortization of (gain) loss		3		—
Net periodic postretirement benefit cost	$	14	$	11