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Commitments And Contingencies (Litigation) (Details) (USD $)
 0 Months Ended 12 Months Ended
Sep. 20, 2011
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Commitments And Contingencies [Abstract]        
Settlement agreement aggregate amount   $ 45,000,000    
Cash paid for settlement 25,000,000 25,000,000 0 0
Settlement agreement, stock issued for settlement, value   5,000,000    
Settlement agreement, stock issued for settlement, shares   195,313    
Settlement agreement, promissory notes issued, amount   15,000,000    
Number of installments in promissory note payable   3    
Annual installments amount   5,000,000    
Percentage of simple interest on promissory note   1.00%    
Litigation settlement, installment due date   September 10, 2012    
Undiscounted liability related to premises asbestos claims   11,000,000 14,000,000  
Receivable for recoveries related to premises asbestos liabilities   $ 7,000,000 $ 10,000,000