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Note 3 - Investment Securities Available for Sale (Details) - Gross Unrealized Losses And Fair Value (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Note 3 - Investment Securities Available for Sale (Details) - Gross Unrealized Losses And Fair Value [Line Items]    
Less than 12 Months Estimated Fair Value $ 210,707 $ 51,955
Less than 12 Months Unrealized Losses 8,652 315
12 Months or Greater Estimated Fair Value 19,019 2,855
12 Months or Greater Unrealized Losses 883 98
Total Estimated Fair Value 229,726 54,810
Total Unrealized Losses 9,535 413
US Government Agencies Debt Securities [Member]
    
Note 3 - Investment Securities Available for Sale (Details) - Gross Unrealized Losses And Fair Value [Line Items]    
Less than 12 Months Estimated Fair Value 4,782 2,999
Less than 12 Months Unrealized Losses 148 1
Total Estimated Fair Value 4,782 2,999
Total Unrealized Losses 148 1
Residential Mortgage Backed Securities [Member]
    
Note 3 - Investment Securities Available for Sale (Details) - Gross Unrealized Losses And Fair Value [Line Items]    
Less than 12 Months Estimated Fair Value 155,475 44,992
Less than 12 Months Unrealized Losses 5,992 263
12 Months or Greater Estimated Fair Value 15,658 2,743
12 Months or Greater Unrealized Losses 683 33
Total Estimated Fair Value 171,133 47,735
Total Unrealized Losses 6,675 296
Equity Investment Other [Member]
    
Note 3 - Investment Securities Available for Sale (Details) - Gross Unrealized Losses And Fair Value [Line Items]    
12 Months or Greater Estimated Fair Value 165 112
12 Months or Greater Unrealized Losses 12 65
Total Estimated Fair Value 165 112
Total Unrealized Losses 12 65
Municipal Bonds [Member]
    
Note 3 - Investment Securities Available for Sale (Details) - Gross Unrealized Losses And Fair Value [Line Items]    
Less than 12 Months Estimated Fair Value 50,450 3,964
Less than 12 Months Unrealized Losses 2,512 51
12 Months or Greater Estimated Fair Value 3,196  
12 Months or Greater Unrealized Losses 188  
Total Estimated Fair Value 53,646 3,964
Total Unrealized Losses $ 2,700 $ 51