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Subsequent Events (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2012
Pro Forma [Member]
Dec. 31, 2012
Venezuelan bolívar [Member]
Feb. 26, 2013
Venezuelan bolívar [Member]
Subsequent Event [Member]
Dec. 31, 2012
Venezuelan bolívar [Member]
Cash and Cash Equivalents [Member]
Subsequent Event [Line Items]          
Exchange rate, bolivar to U.S. dollar 4.3     6.3  
Net monetary assets denominated in Venezuelan bolivars     $ 2.0    
Asset denominated in Venezuelan bolivars         1.0
Translation loss if the devaluation occurred in 2012   0.6      
Charge expected to be recognized in the first quarter of 2013, related to the devaluation $ 0.7