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Goodwill and Other Intangible Assets (Details 1) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Amortization of intangible assets    
2012 $ 1,349,000  
2013 2,360,000  
2014 2,081,000  
2015 1,852,000  
2016 1,662,000  
Thereafter 4,427,000  
Balance $ 13,731,000 $ 7,256,000