v2.4.0.6
Line of Credit (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2010
Dec. 31, 2009
Apr. 30, 2008
Line of Credit (Textual) [Abstract]        
Amount lender could advance       $ 45
Amount taken from prime rate for option one 0.50%      
Amount added to LIBOR for option two 2.00%      
Interest rate Description, Line of Credit Facility LIBOR rate plus 2.00%      
Period of written notice for termination of line of credit agreement 60 days      
Agreement termination date Sep. 22, 2010      
Amount drawn against Line of credit   $ 0 $ 25.5  
Line of credit facility percentage outstanding     88.00%