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Note 4 - Credit Quality - Loans Modified as Troubled Debt Restructurings by Loan Class Segregated by Accrual Status (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
TDRs $ 10,179 $ 14,236
Nonaccrual [1] 1,594 1,284
Accrual 8,585 12,952
Allowance for loan losses related to TDRs 770 670
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]    
TDRs 915 930
Nonaccrual [1] 35 38
Accrual 880 892
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]    
TDRs 295 4,160
Nonaccrual [1]
Accrual 295 4,160
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]    
TDRs 152 158
Nonaccrual [1]
Accrual 152 158
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]    
TDRs 8,582 8,408
Nonaccrual [1] 1,559 905
Accrual 7,023 7,503
Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]    
TDRs 235 580
Nonaccrual [1] 341
Accrual $ 235 $ 239
[1] Nonaccrual TDRs are included in total nonaccrual loans disclosed in the nonaccrual table above.