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Securities (Details 4) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Securities available for sale        
Proceeds $ 4,090 $ 20,153 $ 92,707 $ 43,763
Gross Gains 103 109 1,549 255
Gross Losses $ 0 $ (25) $ (149) $ (97)