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Note 5 - Securities (Details) - Sales of Securities (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Note 5 - Securities (Details) - Sales of Securities [Line Items]        
Proceeds from sales of securities $ 13,036 $ 32,502 $ 81,820 $ 77,845
Gross realized gains on sales of securities:        
Gross realized gains on sales of securities 143 589 677 1,284
Gross realized losses on sales of securities        
Gross realized losses on sales of securities (111) (253) (929) (353)
(Loss) gain on investment securities, net 32 336 (252) 931
Obligations of State and Political Subdivisions [Member]
       
Gross realized gains on sales of securities:        
Gross realized gains on sales of securities 44 35 215 212
Gross realized losses on sales of securities        
Gross realized losses on sales of securities (50) (108) (209) (118)
Residential Mortgage Backed Securities and Collateralized Mortgage Obligations [Member]
       
Gross realized gains on sales of securities:        
Gross realized gains on sales of securities 7 135 75 240
Gross realized losses on sales of securities        
Gross realized losses on sales of securities (61) (13) (543) (63)
Corporate Debt Securities [Member]
       
Gross realized gains on sales of securities:        
Gross realized gains on sales of securities 82 419 309 780
Gross realized losses on sales of securities        
Gross realized losses on sales of securities   (12) (8) (25)
Commercial Mortgage Backed Securities [Member]
       
Gross realized gains on sales of securities:        
Gross realized gains on sales of securities     5  
Gross realized losses on sales of securities        
Gross realized losses on sales of securities     (33)  
Other Asset Backed Securities [Member]
       
Gross realized gains on sales of securities:        
Gross realized gains on sales of securities 10   73 52
Gross realized losses on sales of securities        
Gross realized losses on sales of securities   (47) (22) (47)
US Government Agencies Debt Securities [Member]
       
Gross realized losses on sales of securities        
Gross realized losses on sales of securities   $ (73) $ (114) $ (100)