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Note 3 - Loans - Covered Loans by Class (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Covered loans $ 20,483 $ 27,948
Commercial Portfolio Segment [Member]    
Covered loans 287 332
Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]    
Covered loans 35 39
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]    
Covered loans 245 284
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]    
Covered loans 7 9
Consumer Real Estate Portfolio Segment [Member]    
Covered loans 20,196 27,616
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]    
Covered loans 16,804 23,720
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]    
Covered loans $ 3,392 $ 3,896