v2.4.0.6
Summary of Significant Accounting Policies Income Tax (Details) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2009
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Income Tax Contingency [Line Items]        
Income taxes paid, including foreign witholding taxes   $ 36,593,000 $ 113,820,000 $ 44,853,000
Unrecognized Tax Benefits 19,100,000      
Other Tax Expense (Benefit)   8,300,000   16,400,000
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions 2,700,000 0 0 2,655,000
Tax Period 1999-2005 [Member]
       
Income Tax Contingency [Line Items]        
Income taxes paid, including foreign witholding taxes $ 29,300,000 $ 29,300,000