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Goodwill and Intangible Assets (Details 3) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Future amortization expense    
2013 $ 622  
2014 595  
2015 595  
2016 559  
2017 507  
Thereafter 2,425  
Net carrying amount $ 5,303 $ 4,311