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Long-term Debt - Debt Table (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Debt Instrument [Line Items]    
Debt $ 506,230 $ 422,440
Current maturities, debt 22,530 14,370
Long-term debt 483,700 408,070
U.S. bank debt and receivables facility [Member]
   
Debt Instrument [Line Items]    
Debt 495,030 417,500
Non-U.S. bank debt and other [Member]
   
Debt Instrument [Line Items]    
Debt $ 11,200 $ 4,940