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Note 3 - Securities (Details) - Held to Maturity Securities (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Costs $ 163,983 $ 160,539
Gross Unrealized Gains 3,304 10,523
Gross Unrealized Losses 7,950 216
Fair Values 159,337 170,846
US Government Agencies [Member]
    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Costs 13,973 7,988
Gross Unrealized Gains 280 563
Gross Unrealized Losses 1,448  
Fair Values 12,805 8,551
States and Political Subdivisions [Member]
    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Costs 149,490 151,209
Gross Unrealized Gains 2,971 9,880
Gross Unrealized Losses 6,502 216
Fair Values 145,959 160,873
Mortgage-backed Securities [Member]
    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Costs 520 691
Gross Unrealized Gains 53 73
Fair Values 573 764
Corporate Securities [Member]
    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Costs   651
Gross Unrealized Gains   7
Fair Values   $ 658