Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2013

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

The components of net periodic benefit cost are as follows:

	Pension Benefits
	Three months ended March 31,
	2013			2012
Components of Net Periodic Pension Cost
Service Cost	$	585		$	1,799
Interest Cost	2,632			2,965
Expected return on assets	(2,960		)	(3,034		)
Amortization of unrecognized prior service costs	117			97
Cumulative net loss	1,174			2,593
Net periodic pension cost	$	1,548		$	4,420

	Postretirement Benefits
	Three months ended March 31,
	2013			2012
Components of Net Periodic Postretirement Cost
Service Cost	$	25		$	19
Interest Cost	130			174
Amortization of unrecognized prior service costs	(117		)	(117		)
Cumulative net loss	67			72
Net periodic postretirement cost	$	105		$	148