Pension and Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2015

General Discussion Of Pension And Other Postretirement Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Three Months Ended March 31,
					Other
					Postretirement
	Pension Benefits				Benefits
		2015		2014		2015		2014
Service cost	$	773	$	734	$	5	$	8
Interest cost and other		1,262		1,542		50		54
Expected return on plan assets		(1,402)		(1,607)		—		—
Actuarial loss amortization		881		789		26		6
Prior service cost amortization		(26)		866		—		—
Net periodic benefit cost	$	1,488	$	2,324	$	81	$	68