Pension and Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2015

General Discussion Of Pension And Other Postretirement Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Three Months Ended June 30,								Six Months Ended June 30,
					Other								Other
					Postretirement								Postretirement
	Pension Benefits				Benefits				Pension Benefits				Benefits
		2015		2014		2015		2014		2015		2014		2015		2014
Service Cost	$	761	$	736	$	6	$	2	$	1,534	$	1,470	$	11	$	10
Interest Cost and other		1,254		1,519		49		62		2,516		3,061		99		116
Expected return on plan assets		(1,396)		(1,601)		—		—		(2,798)		(3,208)		—		—
Actuarial loss amortization		877		759		26		26		1,758		1,548		52		32
Prior service cost amortization		(25)		(15)		—		—		(51)		851		—		—
Net periodic benefit cost	$	1,471	$	1,398	$	81	$	90	$	2,959	$	3,722	$	162	$	158