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Note 4 - Summary of PCI Loans (Details) - Purchased Credit Impaired Loans [Member] - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Residential Portfolio Segment [Member]    
Residential real estate $ 477 $ 884
Commercial Portfolio Segment [Member]    
Residential real estate 293 466
Residential real estate 770 1,350
Allowance for loan losses (6)
Carrying amount, net of allowance $ 764 $ 1,350