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Goodwill and Intangible Assets (Details Textual) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Goodwill and Intangible Assets (Textual) [Abstract]        
Aggregate amortization expense on intangible assets $ 466,000 $ 453,000 $ 1,370,744 $ 1,406,826
Estimated aggregate amortization expense for 2012 449,000   449,000  
Estimated aggregate amortization expense for 2013 1,800,000   1,800,000  
Estimated aggregate amortization expense for 2014 943,000   943,000  
Estimated aggregate amortization expense for 2015 870,000   870,000  
Estimated aggregate amortization expense for 2016 816,000   816,000  
Estimated aggregate amortization expense for 2017 $ 775,000   $ 775,000