Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Income Taxes          
Provision for income taxes, as a percentage of income (loss) before income taxes 25.00% (42.20%) 25.50% 14.10%  
U.S. federal statutory rate (as a percent) 35.00% 35.00% 35.00% 35.00%  
Utilization of foreign tax credits (as a percent) (6.80%)   (6.50%)    
Addition to net favorable items (as a percent) (4.20%)   (4.00%)    
Contract termination costs (as a percent)       (9.50%)  
Addition to net favorable foreign items related to foreign tax rate differences, the impact of unremitted earnings, and a favorable inflation adjustment related to Venezuela (as a percent)   (3.90%)   (11.50%)  
Accrued amount related to uncertain tax positions $ 9,772   $ 9,772   $ 10,426