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Goodwill and Intangible Assets (Details Textual) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Goodwill and Intangible Assets (Textual) [Abstract]        
Total amortization expense for intangible assets $ 59,000 $ 59,000 $ 117,000 $ 118,000