Pensions and Other Postretirement Benefits Level 4 (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer	$ 1,900,000
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	396,000	287,000
Defined Benefit Plan, Interest Cost	420,000	428,000
Defined Benefit Plan, Expected Return on Plan Assets	(323,000)	(306,000)
Defined Benefit Plan, Amortization of Transition Obligations (Assets)	(22,000)	(22,000)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	40,000	40,000
Defined Benefit Plan, Amortization of Gains (Losses)	117,000	0
Defined Benefit Plan, Net Periodic Benefit Cost	$ 628,000	$ 427,000