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Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]    
Available-for-sale Securities Fair Value $ 190,401 $ 182,402
US Government Agencies [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]    
Available-for-sale Securities Fair Value 156,335 147,854
US Government Agencies [Member]
    
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]    
Available-for-sale Securities Fair Value 156,335 147,854
States and Political Subdivisions [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]    
Available-for-sale Securities Fair Value 22,408 23,456
States and Political Subdivisions [Member]
    
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]    
Available-for-sale Securities Fair Value 22,408 23,456
Mortgage-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]    
Available-for-sale Securities Fair Value 2,607 2,840
Mortgage-backed Securities [Member]
    
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]    
Available-for-sale Securities Fair Value 2,607 2,840
Corporate Securities [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]    
Available-for-sale Securities Fair Value 8,573 7,395
Corporate Securities [Member]
    
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]    
Available-for-sale Securities Fair Value 8,573 7,395
Other Securities [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]    
Available-for-sale Securities Fair Value 478 857
Other Securities [Member]
    
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]    
Available-for-sale Securities Fair Value 478 857
Fair Value, Inputs, Level 2 [Member]
    
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]    
Available-for-sale Securities Fair Value $ 190,401 $ 182,402