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Subsequent Event (Details) (USD $)
In Millions, unless otherwise specified
1 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended
Feb. 28, 2013
Employee
Dec. 31, 2011
Dec. 31, 2012
Mar. 31, 2013
Maximum [Member]
Mar. 31, 2013
Minimum [Member]
Subsequent Event (Textual) [Abstract]          
Severance Costs   $ 0.4 $ 1.4 $ 1.8 $ 1.5
Subsequent Event (Additional Textual) [Abstract]          
Reduction in job 30        
Reduction in workforce in percentage 2.50%