v2.4.0.6
Income Taxes Uncertain Tax Positions (Details) (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Income Tax Examination [Line Items]      
Unrecognized tax benefits, beginning $ 6,084,000 $ 6,084,000 $ 19,328,000
Increases for tax provisions taken during a prior period 0 0 0
Increases for tax provisions taken during the current period 0 0 0
Decreaes relating to settlements 0 0 0
Decreases resulting from the expiration of the statute of limitations 0 0 (13,244,000)
Unrecognized tax benefits, ending 6,084,000 6,084,000 6,084,000
Gross interest and penalties related to unrecognized tax benefits 600,000 400,000 800,000
Accrued gross interest and penalites 7,600,000 6,900,000  
Significant change in unrecognized tax benefits, amount 4,000,000    
Unrecognized Tax Benefit, Tax [Member]
      
Income Tax Examination [Line Items]      
Unrecognized tax benefits that would impact effective tax rate 4,000,000 4,000,000  
Unrecognized Tax Benefit, Interest and Penalties [Member]
      
Income Tax Examination [Line Items]      
Unrecognized tax benefits that would impact effective tax rate $ 5,800,000 $ 5,300,000