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Note 7 - Investment Securities (Details) - Gross Realized Losses on Equity and Debt Securities and Other Than Temporary Impairment (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Note 7 - Investment Securities (Details) - Gross Realized Losses on Equity and Debt Securities and Other Than Temporary Impairment [Line Items]        
Gross realized gains     $ 1,007 $ 559
Gross realized losses     (100)  
Other-than-temporary impairment losses       (43)
Net gains (losses) 285 93 907 516
Equity Securities [Member]
       
Note 7 - Investment Securities (Details) - Gross Realized Losses on Equity and Debt Securities and Other Than Temporary Impairment [Line Items]        
Gross realized gains     870 369
Gross realized losses     (6)  
Other-than-temporary impairment losses       (43)
Net gains (losses)     864 326
Debt Securities [Member]
       
Note 7 - Investment Securities (Details) - Gross Realized Losses on Equity and Debt Securities and Other Than Temporary Impairment [Line Items]        
Gross realized gains     137 190
Gross realized losses     (94)  
Net gains (losses)     $ 43 $ 190