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Note 4 - Fair Value Disclosure Measurements (Details) - Assets Measured on a Nonrecurring Basis (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Assets measured on a non-recurring basis:    
Impaired loans $ 18,007 $ 21,288
Fair Value, Inputs, Level 1 [Member]
    
Assets measured on a non-recurring basis:    
Impaired loans 0 0
Other real estate owned 0 0
Fair Value, Inputs, Level 2 [Member]
    
Assets measured on a non-recurring basis:    
Impaired loans 0 0
Other real estate owned 0 0
Fair Value, Inputs, Level 3 [Member]
    
Assets measured on a non-recurring basis:    
Impaired loans 15,467 17,600
Other real estate owned 2,719 1,846
Estimate of Fair Value Measurement [Member]
    
Assets measured on a non-recurring basis:    
Impaired loans 15,467 17,600
Other real estate owned $ 2,719 $ 1,846