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Warranties (Details Textual) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Segment Reporting Information [Line Items]      
Warranty expense $ 7.0 $ 3.3  
Current liabilities 9.4   5.8
Non-current liabilities 1.2   0.8
INDIA
     
Segment Reporting Information [Line Items]      
Current liabilities $ 3.3