Benefit Plans Schedule of Net Benefit Costs Details (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 182	$ 585	$ 546	$ 1,755
Defined Benefit Plan, Interest Cost	3,584	2,632	10,753	7,896
Defined Benefit Plan, Expected Return on Plan Assets	(4,009)	(2,960)	(12,026)	(8,880)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	633	117	1,965	351
Defined Benefit Plan, Amortization of Gains (Losses)	708	1,174	2,221	3,522
Defined Benefit Plan, Net Periodic Benefit Cost	1,098	1,548	3,459	4,644
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	16	24	49	74
Defined Benefit Plan, Interest Cost	164	130	491	390
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(117)	(117)	(351)	(351)
Defined Benefit Plan, Amortization of Gains (Losses)	59	67	177	201
Defined Benefit Plan, Net Periodic Benefit Cost	$ 122	$ 104	$ 366	$ 314