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Note 3 - Loans - Impaired Loan Data (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Unpaid contractual principal balance with no related allowance | $ 23,400 | $ 18,364 | $ 20,807
Impaired balance with no related allowance | 22,674 | 16,961 | 20,274
Average recorded investment with no related allowance | 21,474 | 20,235 | 21,504
Interest income recognized with no related allowance | 246 | 151 | 712
Interest income collected with no related allowance | 246 | 161 | 835
Unpaid contractual principal balance with an allowance | 6,514 | 8,740 | 10,485
Impaired balance with an allowance | 5,713 | 8,718 | 10,387
Related allowance | 3,439 | 2,531 | 3,435
Average recorded investment with an allowance | 8,050 | 9,668 | 9,871
Interest income recognized with an allowance | 24 | 56 | 289
Interest income collected with an allowance | 24 | 58 | 291
Unpaid contractual principal balance | 29,914 | 27,104 | 31,292
Impaired balance | 28,387 | 25,679 | 30,661
Average recorded investment | 29,524 | 29,903 | 31,375
Interest income recognized | 270 | 207 | 1,001
Interest income collected | 270 | 219 | 1,126
Commercial and Agricultural Portfolio Segment [Member] | Commercial [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 876 | 502 | 635
Impaired balance with no related allowance | 673 | 500 | 635
Average recorded investment with no related allowance | 654 | 477 | 539
Interest income recognized with no related allowance | 8 | 2 | 24
Interest income collected with no related allowance | 8 | 3 | 27
Unpaid contractual principal balance with an allowance |  | 29 |
Impaired balance with an allowance |  | 28 |
Related allowance |  | 4 |
Average recorded investment with an allowance |  | 76 | 30
Interest income recognized with an allowance |  |  |
Interest income collected with an allowance |  |  |
Unpaid contractual principal balance | 876 | 531 | 635
Impaired balance | 673 | 528 | 635
Average recorded investment | 654 | 553 | 569
Interest income recognized | 8 | 2 | 24
Interest income collected | 8 | 3 | 27
Commercial and Agricultural Portfolio Segment [Member] | Agricultural [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 226 | 213 | 229
Impaired balance with no related allowance | 206 | 193 | 209
Average recorded investment with no related allowance | 207 | 185 | 210
Interest income recognized with no related allowance | 12 | 7 | 9
Interest income collected with no related allowance | 12 | 10 | 12
Unpaid contractual principal balance with an allowance | 0 | 0 | 0
Impaired balance with an allowance | 0 | 0 | 0
Related allowance | 0 | 0 | 0
Average recorded investment with an allowance | 0 | 0 | 0
Interest income recognized with an allowance | 0 | 0 | 0
Interest income collected with an allowance | 0 | 0 | 0
Unpaid contractual principal balance | 226 | 213 | 229
Impaired balance | 206 | 193 | 209
Average recorded investment | 207 | 185 | 210
Interest income recognized | 12 | 7 | 9
Interest income collected | 12 | 10 | 12
Real Estate Portfolio Segment [Member] | Commercial [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 15,980 | 10,439 | 14,358
Impaired balance with no related allowance | 15,899 | 9,992 | 14,276
Average recorded investment with no related allowance | 15,088 | 12,557 | 14,275
Interest income recognized with no related allowance | 166 | 89 | 567
Interest income collected with no related allowance | 164 | 93 | 560
Unpaid contractual principal balance with an allowance | 5,300 | 7,279 | 8,557
Impaired balance with an allowance | 4,506 | 7,265 | 8,467
Related allowance | 3,051 | 1,940 | 3,022
Average recorded investment with an allowance | 6,487 | 8,110 | 8,340
Interest income recognized with an allowance | 17 | 50 | 239
Interest income collected with an allowance | 17 | 52 | 236
Unpaid contractual principal balance | 21,280 | 17,718 | 22,915
Impaired balance | 20,405 | 17,257 | 22,743
Average recorded investment | 21,575 | 20,667 | 22,615
Interest income recognized | 183 | 139 | 806
Interest income collected | 181 | 145 | 796
Real Estate Portfolio Segment [Member] | Commercial Construction [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 184 | 466 | 191
Impaired balance with no related allowance | 184 | 466 | 191
Average recorded investment with no related allowance | 187 | 1,182 | 698
Interest income recognized with no related allowance | 1 | 4 | 7
Interest income collected with no related allowance | 1 | 3 | 7
Unpaid contractual principal balance with an allowance | 72 | 75 | 72
Impaired balance with an allowance | 72 | 75 | 72
Related allowance | 21 | 24 | 21
Average recorded investment with an allowance | 72 | 76 | 74
Interest income recognized with an allowance | 1 |  | 1
Interest income collected with an allowance | 1 |  | 2
Unpaid contractual principal balance | 256 | 541 | 263
Impaired balance | 256 | 541 | 263
Average recorded investment | 259 | 1,258 | 772
Interest income recognized | 2 | 4 | 8
Interest income collected | 2 | 3 | 9
Real Estate Portfolio Segment [Member] | Residential [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 5,010 | 5,209 | 4,261
Impaired balance with no related allowance | 4,709 | 4,288 | 3,952
Average recorded investment with no related allowance | 4,331 | 4,432 | 4,553
Interest income recognized with no related allowance | 56 | 52 | 73
Interest income collected with no related allowance | 58 | 48 | 191
Unpaid contractual principal balance with an allowance | 764 | 971 | 1,476
Impaired balance with an allowance | 757 | 964 | 1,468
Related allowance | 340 | 528 | 363
Average recorded investment with an allowance | 1,112 | 1,019 | 1,043
Interest income recognized with an allowance | 1 | 1 | 28
Interest income collected with an allowance | 1 | 1 | 32
Unpaid contractual principal balance | 5,774 | 6,180 | 5,737
Impaired balance | 5,466 | 5,252 | 5,420
Average recorded investment | 5,443 | 5,451 | 5,596
Interest income recognized | 57 | 53 | 101
Interest income collected | 59 | 49 | 223
Real Estate Portfolio Segment [Member] | Farmland [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 921 | 1,328 | 921
Impaired balance with no related allowance | 800 | 1,327 | 799
Average recorded investment with no related allowance | 800 | 1,215 | 1,016
Interest income recognized with no related allowance | 1 | (4) | 22
Interest income collected with no related allowance | 1 |  | 26
Unpaid contractual principal balance with an allowance | 378 | 386 | 380
Impaired balance with an allowance | 378 | 386 | 380
Related allowance | 27 | 35 | 29
Average recorded investment with an allowance | 379 | 387 | 384
Interest income recognized with an allowance | 5 | 5 | 21
Interest income collected with an allowance | 5 | 5 | 21
Unpaid contractual principal balance | 1,299 | 1,714 | 1,301
Impaired balance | 1,178 | 1,713 | 1,179
Average recorded investment | 1,179 | 1,602 | 1,400
Interest income recognized | 6 | 1 | 43
Interest income collected | 6 | 5 | 47
Consumer and Other Portfolio Segment [Member] | Consumer [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 203 | 207 | 212
Impaired balance with no related allowance | 203 | 195 | 212
Average recorded investment with no related allowance | 207 | 187 | 213
Interest income recognized with no related allowance | 2 | 1 | 10
Interest income collected with no related allowance | 2 | 4 | 12
Unpaid contractual principal balance with an allowance | 0 | 0 | 0
Impaired balance with an allowance | 0 | 0 | 0
Related allowance | 0 | 0 | 0
Average recorded investment with an allowance | 0 | 0 | 0
Interest income recognized with an allowance | 0 | 0 | 0
Interest income collected with an allowance | 0 | 0 | 0
Unpaid contractual principal balance | 203 | 207 | 212
Impaired balance | 203 | 195 | 212
Average recorded investment | 207 | 187 | 213
Interest income recognized | 2 | 1 | 10
Interest income collected | 2 | $ 4 | $ 12
Consumer and Other Portfolio Segment [Member] | Other [Member] |  |  |
Unpaid contractual principal balance with no related allowance |  |  |
Impaired balance with no related allowance |  |  |
Average recorded investment with no related allowance |  |  |
Interest income recognized with no related allowance |  |  |
Interest income collected with no related allowance |  |  |
Unpaid contractual principal balance with an allowance |  |  |
Impaired balance with an allowance |  |  |
Related allowance |  |  |
Average recorded investment with an allowance |  |  |
Interest income recognized with an allowance |  |  |
Interest income collected with an allowance |  |  |
Unpaid contractual principal balance |  |  |
Impaired balance |  |  |
Average recorded investment |  |  |
Interest income recognized |  |  |
Interest income collected |  |  |

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