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Investment Securities (Gain (Loss) on Investment Sales) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2012
Sep. 30, 2011
Investment Securities [Abstract]      
Proceeds from Sale of Available-for-sale Securities   $ 14,418 $ 15,762
Gross Realized Gains- AFS 161 246 85
Gross realized losses-AFS   (6) (83)
Net realized gain $ 161 $ 240 $ 2