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Note 4 - Fair Value Measurements (Detail) - Assets Measured on a Nonrecurring Basis (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Assets Measured on a non-recurring Basis:    
Impaired loans $ 17,233 $ 18,237
Fair Value, Inputs, Level 3 [Member]
   
Assets Measured on a non-recurring Basis:    
Impaired loans 14,258 16,535
Other real estate owned 2,332 2,196
Estimate of Fair Value, Fair Value Disclosure [Member]
   
Assets Measured on a non-recurring Basis:    
Impaired loans 14,258 16,535
Other real estate owned $ 2,332 $ 2,196