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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 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Note 7 - Investment Securities (Details) - Gross Realized Losses on Equity and Debt Securities and Other Than Temporary Impairment [Line Items]        
Gross realized gains     $ 862 $ 572
Gross realized losses       (79)
Other-than-temporary impairment losses     (43)  
Net gains (losses) 303 (37) 819 493
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     672 427
Other-than-temporary impairment losses     (43)  
Net gains (losses)     629 427
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     190 145
Gross realized losses       (79)
Net gains (losses)     $ 190 $ 66