Pension and Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2015

General Discussion Of Pension And Other Postretirement Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Three Months Ended September 30,								Nine Months Ended September 30,
					Other								Other
					Postretirement								Postretirement
	Pension Benefits				Benefits				Pension Benefits				Benefits
		2015		2014		2015		2014		2015		2014		2015		2014
Service Cost	$	763	$	716	$	1	$	5	$	2,297	$	2,186	$	12	$	15
Interest Cost		1,256		1,506		47		58		3,772		4,567		146		174
Expected return on plan assets		(1,367)		(1,588)		—		—		(4,165)		(4,796)		—		—
Actuarial loss amortization		862		763		12		16		2,620		2,311		64		48
Prior service cost amortization		(25)		(21)		—		—		(76)		830		—		—
Net periodic benefit cost	$	1,489	$	1,376	$	60	$	79	$	4,448	$	5,098	$	222	$	237