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Secondary Market Mortgage Activities (Details 1) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Summary of activity for capitalized mortgage servicing rights      
Balance, beginning of year $ 906 $ 909 $ 876
Additions 85 249 256
Amortization (277) (252) (223)
Balance, end of year $ 714 $ 906 $ 909