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Income Tax (Details 3)
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Reconciliation of the US statutory federal tax rate to the consolidated effective income tax rate    
US federal statutory rate35.00%35.00%35.00%35.00%
US state income taxes100.00%   
Non-US income taxed at different rates(10.00%)(12.00%)(10.00%)(14.00%)
Charges (See Note 2) (10.00%) 4.00%
Other(2.00%)(2.00%)100.00%(1.00%)
Effective income tax rate24.00%11.00%24.00%16.00%