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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
Mar. 31, 2017
Dec. 31, 2016
Nonaccrual [1] $ 1,428 $ 1,284
Accrual 8,593 12,952
TDRs 10,021 14,236
Allowance for loan losses related to TDRs 707 670
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]    
Nonaccrual [1] 35 38
Accrual 880 892
TDRs 915 930
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]    
Nonaccrual [1]
Accrual 295 4,160
TDRs 295 4,160
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]    
Nonaccrual [1]
Accrual 152 158
TDRs 152 158
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]    
Nonaccrual [1] 1,060 905
Accrual 7,031 7,503
TDRs 8,091 8,408
Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]    
Nonaccrual [1] 333 341
Accrual 235 239
TDRs $ 568 $ 580
[1] Nonaccrual TDRs are included in total nonaccrual loans disclosed in the nonaccrual table above.