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Note 4 - Loans - Impaired Loan Data (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Unpaid contractual principal balance with no related allowance | $ 20,460 | $ 16,948 | $ 19,810
Impaired balance with no related allowance | 19,802 | 16,503 | 19,703
Average recorded investment with no related allowance | 19,753 | 17,898 | 17,644
Interest income recognized with no related allowance | 173 | 191 | 904
Interest income collected with no related allowance | 235 | 192 | 949
Unpaid contractual principal balance with an allowance | 2,613 | 6,227 | 4,770
Impaired balance with an allowance | 2,613 | 6,227 | 4,770
Related allowance | 905 | 1,770 | 1,418
Average recorded investment with an allowance | 3,691 | 6,465 | 6,061
Interest income recognized with an allowance | 30 | 60 | 169
Interest income collected with an allowance | 30 | 53 | 177
Unpaid contractual principal balance | 23,073 | 23,175 | 24,580
Impaired balance | 22,415 | 22,730 | 24,473
Average recorded investment | 23,444 | 24,363 | 23,705
Interest income recognized | 203 | 251 | 1,073
Interest income collected | 265 | 245 | 1,126
Commercial and Agricultural Portfolio Segment [Member] | Commercial [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 594 | 595 | 595
Impaired balance with no related allowance | 537 | 595 | 595
Average recorded investment with no related allowance | 566 | 596 | 526
Interest income recognized with no related allowance | 8 | 8 | 21
Interest income collected with no related allowance | 8 | 8 | 24
Unpaid contractual principal balance with an allowance | 0 | 0 | 42
Impaired balance with an allowance | 0 | 0 | 42
Related allowance | 0 | 0 | 6
Average recorded investment with an allowance | 21 | 0 | 8
Interest income recognized with an allowance | 0 | 0 | 2
Interest income collected with an allowance | 0 | 0 | 2
Unpaid contractual principal balance | 594 | 595 | 637
Impaired balance | 537 | 595 | 637
Average recorded investment | 587 | 596 | 534
Interest income recognized | 8 | 8 | 23
Interest income collected | 8 | 8 | 26
Commercial and Agricultural Portfolio Segment [Member] | Agricultural [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 525 | 411 | 434
Impaired balance with no related allowance | 504 | 390 | 413
Average recorded investment with no related allowance | 459 | 394 | 383
Interest income recognized with no related allowance | 11 | 8 | 18
Interest income collected with no related allowance | 14 | 12 | 25
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 | 525 | 411 | 434
Impaired balance | 504 | 390 | 413
Average recorded investment | 459 | 394 | 383
Interest income recognized | 11 | 8 | 18
Interest income collected | 14 | 12 | 25
Real Estate Portfolio Segment [Member] | Commercial [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 12,599 | 10,438 | 12,164
Impaired balance with no related allowance | 12,543 | 10,438 | 12,164
Average recorded investment with no related allowance | 12,354 | 11,538 | 11,040
Interest income recognized with no related allowance | 143 | 118 | 582
Interest income collected with no related allowance | 145 | 112 | 583
Unpaid contractual principal balance with an allowance | 1,985 | 5,337 | 3,691
Impaired balance with an allowance | 1,985 | 5,337 | 3,691
Related allowance | 819 | 1,662 | 1,276
Average recorded investment with an allowance | 2,838 | 5,533 | 5,121
Interest income recognized with an allowance | 16 | 53 | 135
Interest income collected with an allowance | 16 | 45 | 142
Unpaid contractual principal balance | 14,584 | 15,775 | 15,855
Impaired balance | 14,528 | 15,775 | 15,855
Average recorded investment | 15,192 | 17,071 | 16,161
Interest income recognized | 159 | 171 | 717
Interest income collected | 161 | 157 | 725
Real Estate Portfolio Segment [Member] | Commercial Construction [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 107 | 42 | 132
Impaired balance with no related allowance | 107 | 42 | 132
Average recorded investment with no related allowance | 120 | 48 | 69
Interest income recognized with no related allowance | 2 | 1 | 8
Interest income collected with no related allowance | 2 | 1 | 8
Unpaid contractual principal balance with an allowance | 0 | 485 | 399
Impaired balance with an allowance | 0 | 485 | 399
Related allowance | 0 | 57 | 39
Average recorded investment with an allowance | 199 | 489 | 466
Interest income recognized with an allowance | 0 | 1 | 0
Interest income collected with an allowance | 0 | 1 | 0
Unpaid contractual principal balance | 107 | 527 | 531
Impaired balance | 107 | 527 | 531
Average recorded investment | 319 | 537 | 535
Interest income recognized | 2 | 2 | 8
Interest income collected | 2 | 2 | 8
Real Estate Portfolio Segment [Member] | Residential Construction [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 0 |  | 0
Impaired balance with no related allowance | 0 |  | 0
Average recorded investment with no related allowance | 0 |  | 0
Interest income recognized with no related allowance | 0 |  | 0
Interest income collected with no related allowance | 0 |  | 0
Unpaid contractual principal balance with an allowance | 0 |  | 0
Impaired balance with an allowance | 0 |  | 0
Related allowance | 0 |  | 0
Average recorded investment with an allowance | 0 |  | 0
Interest income recognized with an allowance | 0 |  | 0
Interest income collected with an allowance | 0 |  | 0
Unpaid contractual principal balance | 0 |  |
Impaired balance | 0 |  |
Average recorded investment | 0 |  | 0
Interest income recognized | 0 |  | 0
Interest income collected | 0 |  | 0
Real Estate Portfolio Segment [Member] | Residential [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 4,481 | 4,379 | 4,214
Impaired balance with no related allowance | 3,958 | 3,956 | 4,130
Average recorded investment with no related allowance | 4,044 | 4,268 | 4,067
Interest income recognized with no related allowance | 7 | 46 | 208
Interest income collected with no related allowance | 59 | 49 | 213
Unpaid contractual principal balance with an allowance | 267 | 36 | 274
Impaired balance with an allowance | 267 | 36 | 274
Related allowance | 52 | 21 | 61
Average recorded investment with an allowance | 271 | 72 | 98
Interest income recognized with an allowance | 8 | 1 | 8
Interest income collected with an allowance | 8 | 1 | 8
Unpaid contractual principal balance | 4,748 | 4,415 | 4,488
Impaired balance | 4,225 | 3,992 | 4,404
Average recorded investment | 4,315 | 4,340 | 4,165
Interest income recognized | 15 | 47 | 216
Interest income collected | 67 | 50 | 221
Real Estate Portfolio Segment [Member] | Farmland [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 2,017 | 873 | 2,054
Impaired balance with no related allowance | 2,016 | 872 | 2,052
Average recorded investment with no related allowance | 2,034 | 855 | 1,361
Interest income recognized with no related allowance | 0 | 7 | 53
Interest income collected with no related allowance | 5 | 7 | 82
Unpaid contractual principal balance with an allowance | 361 | 369 | 364
Impaired balance with an allowance | 361 | 369 | 364
Related allowance | 34 | 30 | 36
Average recorded investment with an allowance | 362 | 371 | 368
Interest income recognized with an allowance | 6 | 5 | 24
Interest income collected with an allowance | 6 | 6 | 25
Unpaid contractual principal balance | 2,378 | 1,242 | 2,418
Impaired balance | 2,377 | 1,241 | 2,416
Average recorded investment | 2,396 | 1,226 | 1,729
Interest income recognized | 6 | 12 | 77
Interest income collected | 11 | 13 | 107
Consumer and Other Portfolio Segment [Member] | Consumer [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 134 | 210 | 213
Impaired balance with no related allowance | 134 | 210 | 213
Average recorded investment with no related allowance | 173 | 199 | 197
Interest income recognized with no related allowance | 2 | 3 | 14
Interest income collected with no related allowance | 2 | 3 | 14
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 | 134 | 210 | 213
Impaired balance | 134 | 210 | 213
Average recorded investment | 173 | 199 | 197
Interest income recognized | 2 | 3 | 14
Interest income collected | 2 | $ 3 | 14
Consumer and Other Portfolio Segment [Member] | Other [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 3 |  | 4
Impaired balance with no related allowance | 3 |  | 4
Average recorded investment with no related allowance | 3 |  | 1
Interest income recognized with no related allowance | 0 |  | 0
Interest income collected with no related allowance | 0 |  | 0
Unpaid contractual principal balance with an allowance | 0 |  |
Impaired balance with an allowance | 0 |  |
Related allowance | 0 |  | 0
Average recorded investment with an allowance | 0 |  | 0
Interest income recognized with an allowance | 0 |  | 0
Interest income collected with an allowance | 0 |  | 0
Unpaid contractual principal balance | 3 |  | 4
Impaired balance | 3 |  | 4
Average recorded investment | 3 |  | 1
Interest income recognized | 0 |  | 0
Interest income collected | $ 0 |  | $ 0

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