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Stockholders Rights Plan (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Stockholders Rights Plan [Abstract]    
Date of dividend declared May 28, 2003  
Dividends payable record date Jun. 10, 2003  
Preferred stock, conversion basis one one-thousandth (1/1000th) of a share  
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Original exercise price (in dollars per share) $ 25.00  
Beneficial ownership (in hundredths) 15.00%  
Beneficial ownership for certain shareholders (in hundredths) 20.00%  
Number of days for commencement 10 days