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Income Taxes (Details Textual) (USD $)
6 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2012
Scenario, Forecast [Member]
Unrecognized Tax Benefits $ 2,307,000 $ 2,069,000  
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 1,677,000 1,496,000  
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations     456,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued $ 128,000 $ 95,000