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Goodwill and Intangible Assets (Details 1) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Expected amortization expense for acquisition-related intangible assets    
2013 $ 206  
2014 135  
2015 135  
2016 130  
2017 98  
Thereafter 365  
Total $ 1,069 $ 1,390