Pensions and Other Postretirement Benefits Level 4 (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer	$ 1,600,000
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	285,000	352,000	572,000	687,000
Defined Benefit Plan, Interest Cost	425,000	454,000	853,000	886,000
Defined Benefit Plan, Expected Return on Plan Assets	(304,000)	(211,000)	(610,000)	(412,000)
Defined Benefit Plan, Amortization of Transition Obligations (Assets)	22,000	22,000	44,000	44,000
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(40,000)	(40,000)	(80,000)	(80,000)
Defined Benefit Plan, Amortization of Gains (Losses)	0	84,000	0	168,000
Defined Benefit Plan, Net Periodic Benefit Cost	$ 424,000	$ 697,000	$ 851,000	$ 1,365,000