Pensions and Other Postretirement Benefits Level 4 (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 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	273,000	340,000	845,000	1,027,000
Defined Benefit Plan, Interest Cost	409,000	438,000	1,262,000	1,324,000
Defined Benefit Plan, Expected Return on Plan Assets	(292,000)	(204,000)	(902,000)	(616,000)
Defined Benefit Plan, Amortization of Transition Obligations (Assets)	(21,000)	(21,000)	(65,000)	(65,000)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	39,000	39,000	119,000	119,000
Defined Benefit Plan, Amortization of Gains (Losses)	0	84,000	0	252,000
Defined Benefit Plan, Net Periodic Benefit Cost	$ 408,000	$ 676,000	$ 1,259,000	$ 2,041,000