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Note 10 - Fair Value Measurements (Detail) - Level 3 Asset Quantitative Information (USD $)
In Thousands, unless otherwise specified
12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Selling Cost [Member]
Minimum [Member]
Impaired Loans [Member]
Fair Value, Inputs, Level 3 [Member]
Dec. 31, 2012
Selling Cost [Member]
Minimum [Member]
Other Real Estate Owned [Member]
Fair Value, Inputs, Level 3 [Member]
Dec. 31, 2012
Selling Cost [Member]
Maximum [Member]
Impaired Loans [Member]
Fair Value, Inputs, Level 3 [Member]
Dec. 31, 2012
Selling Cost [Member]
Maximum [Member]
Other Real Estate Owned [Member]
Fair Value, Inputs, Level 3 [Member]
Dec. 31, 2012
Selling Cost [Member]
Impaired Loans [Member]
Fair Value, Inputs, Level 3 [Member]
Dec. 31, 2012
Selling Cost [Member]
Other Real Estate Owned [Member]
Fair Value, Inputs, Level 3 [Member]
Dec. 31, 2012
Discount for Lack of Marketability [Member]
Minimum [Member]
Impaired Loans [Member]
Fair Value, Inputs, Level 3 [Member]
Dec. 31, 2012
Discount for Lack of Marketability [Member]
Minimum [Member]
Other Real Estate Owned [Member]
Fair Value, Inputs, Level 3 [Member]
Dec. 31, 2012
Discount for Lack of Marketability [Member]
Maximum [Member]
Impaired Loans [Member]
Fair Value, Inputs, Level 3 [Member]
Dec. 31, 2012
Discount for Lack of Marketability [Member]
Maximum [Member]
Other Real Estate Owned [Member]
Fair Value, Inputs, Level 3 [Member]
Dec. 31, 2012
Discount for Lack of Marketability [Member]
Impaired Loans [Member]
Fair Value, Inputs, Level 3 [Member]
Dec. 31, 2012
Discount for Lack of Marketability [Member]
Other Real Estate Owned [Member]
Fair Value, Inputs, Level 3 [Member]
Dec. 31, 2012
Internal Evaluations [Member]
Minimum [Member]
Other Real Estate Owned [Member]
Fair Value, Inputs, Level 3 [Member]
Dec. 31, 2012
Internal Evaluations [Member]
Maximum [Member]
Other Real Estate Owned [Member]
Fair Value, Inputs, Level 3 [Member]
Dec. 31, 2012
Internal Evaluations [Member]
Other Real Estate Owned [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value (in Dollars) $ 1,338 $ 4,084         $ 1,068                    
Valuation Techniques             Discounted appraised value Discounted appraised value                 Internal evaluations
Unobservable Input             Selling cost Selling cost         Discount for lack of marketability and age of appraisal Discount for lack of marketability and age     Internal evaluations
Range     6.00% 6.00% 10.00% 10.00%     0.00% 0.00% 10.00% 30.00%     10.00% 50.00%  
Fair Value (in Dollars)               $ 2,177                 $ 2,379
Unobservable Input             Selling cost Selling cost         Discount for lack of marketability and age of appraisal Discount for lack of marketability and age     Internal evaluations
Range     6.00% 6.00% 10.00% 10.00%     0.00% 0.00% 10.00% 30.00%     10.00% 50.00%