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Fair Value Measurements (Details 2) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Other real estate owned:    
Beginning balance $ 9,385 $ 3,702
Sales (1,404) (712)
Write-downs (853) (168)
Additions 4,371 5,055
Ending balance $ 11,499 $ 7,877