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Intangible Assets (Details 1) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Changes in the net carrying amount of core deposit intangible assets    
Amortization $ (101) $ (104)
Core Deposit Intangible Asset [Member]
   
Changes in the net carrying amount of core deposit intangible assets    
Balance at beginning of year 135 543
Additions 0 0
Amortization (101) (104)
Balance at end of year $ 34 $ 439