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Long-Term Debt (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Schedule of Long-term debt    
Long-term debt $ 37.0 $ 30.0
Less current portion (5.0) (5.0)
Long-term debt, net of current portion 32.0 25.0
Revolving credit facility [Member]
   
Schedule of Long-term debt    
Long-term debt 27.0 20.0
Promissory note [Member]
   
Schedule of Long-term debt    
Long-term debt $ 10.0 $ 10.0