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Fair Values (Details 1) (Fair Value, Measurements, Nonrecurring [Member], USD $)
Mar. 31, 2013
Dec. 31, 2012
Assets measured at fair value on a nonrecurring basis    
Impaired loans $ 31,767,000 $ 34,406,000
Foreclosed assets 6,506,000 6,970,000
Total 38,273,000 41,376,000
Level 1 [Member]
    
Assets measured at fair value on a nonrecurring basis    
Impaired loans 0 0
Foreclosed assets 0 0
Total 0 0
Level 2 [Member]
    
Assets measured at fair value on a nonrecurring basis    
Impaired loans 0 0
Foreclosed assets 0 0
Total 0 0
Level 3 [Member]
    
Assets measured at fair value on a nonrecurring basis    
Impaired loans 31,767,000 34,406,000
Foreclosed assets 6,506,000 6,970,000
Total $ 38,273,000 $ 41,376,000