Pension and Postretirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2013

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

Net Periodic Benefit Cost (in thousands)

	Three Months Ended March 31,
	Defined Benefit Retirement Plan				Postretirement Benefits Plan
	2013		2012		2013		2012
Net Periodic Benefit Cost
Service cost	$	112	$	139	$	19	$	15
Interest cost	250		253		65		57
Amortization of net loss	450		336		—		6
Net periodic benefit cost	$	812	$	728	$	84	$	78