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Short-Term and Long-Term Debt (Revolving Credit Lines) (Details) (USD $)
1 Months Ended 9 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Jul. 26, 2011
RBS Citizens [Member]
Sep. 30, 2013
RBS Citizens [Member]
Debt Instrument [Line Items]        
Line of credit, maximum borrowing amount $ 194,680 $ 349,976 $ 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 $ 261,900