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Short-Term and Long-Term Debt (Revolving Credit Lines) (Details) (Revolving Credit Facility [Member], RBS Citizens [Member], USD $)
0 Months Ended 3 Months Ended
Jul. 26, 2011
Mar. 31, 2014
Dec. 31, 2013
Revolving Credit Facility [Member] | RBS Citizens [Member]
     
Debt Instrument [Line Items]      
Line of credit, maximum borrowing amount   $ 1,000,000  
Interest rate additional rate above LIBOR 3.75% 3.93%  
Revolving credit facility, expiration date   May 31, 2014  
Credit facility, amount outstanding   $ 0 $ 158,087