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Income Taxes (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Income Taxes          
Income tax expense (benefit) $ 196,000 $ 102,000 $ 771,000 $ (779,000)  
Income tax rate, percentage 35.60% 21.10% 45.10% 31.50%  
Unrecognized tax benefits 430,000   430,000   430,000
Unrecognized tax benefits, if recognized, that would affect the effective income tax rates of future periods $ 430,000   $ 430,000