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Note 3 - Impaired Loan Data (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Dec. 31, 2015
Commercial and Agricultural Portfolio Segment [Member] | Commercial [Member] |  |  |
Unpaid contractual principal balance with no related allowance | $ 502 | $ 492 | $ 454
Impaired balance with no related allowance | 500 | 464 | 454
Average recorded investment with no related allowance | 477 | 386 | 535
Interest income recognized with no related allowance | 2 | (7) | 17
Interest income collected with no related allowance | 3 | 5 | 21
Unpaid contractual principal balance with an allowance | 29 | 94 | 123
Impaired balance with an allowance | 28 | 94 | 123
Related allowance | 4 | 94 | 95
Average recorded investment with an allowance | 76 | 95 | 100
Interest income recognized with an allowance |  |  | 2
Interest income collected with an allowance |  |  | 3
Unpaid contractual principal balance | 531 | 586 | 577
Impaired balance | 528 | 558 | 577
Average recorded investment | 553 | 481 | 635
Interest income recognized | 2 | (7) | 19
Interest income collected | 3 | 5 | 24
Commercial and Agricultural Portfolio Segment [Member] | Agricultural [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 213 | 174 | 196
Impaired balance with no related allowance | 193 | 156 | 178
Average recorded investment with no related allowance | 185 | 101 | 163
Interest income recognized with no related allowance | 7 | (10) | (10)
Interest income collected with no related allowance | 10 | 10 | 10
Unpaid contractual principal balance | 213 | 174 | 196
Impaired balance | 193 | 156 | 178
Average recorded investment | 185 | 101 | 163
Interest income recognized | 7 | (10) | (10)
Interest income collected | 10 | 10 | 10
Real Estate Portfolio Segment [Member] | Commercial [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 10,439 | 17,531 | 15,569
Impaired balance with no related allowance | 9,992 | 17,037 | 15,122
Average recorded investment with no related allowance | 12,557 | 16,632 | 15,430
Interest income recognized with no related allowance | 89 | 157 | 529
Interest income collected with no related allowance | 93 | 163 | 531
Unpaid contractual principal balance with an allowance | 7,279 | 5,463 | 8,969
Impaired balance with an allowance | 7,265 | 5,463 | 8,956
Related allowance | 1,940 | 209 | 1,608
Average recorded investment with an allowance | 8,110 | 5,799 | 6,673
Interest income recognized with an allowance | 50 | 45 | 214
Interest income collected with an allowance | 52 | 45 | 209
Unpaid contractual principal balance | 17,718 | 22,994 | 24,538
Impaired balance | 17,257 | 22,500 | 24,078
Average recorded investment | 20,667 | 22,431 | 22,103
Interest income recognized | 139 | 202 | 743
Interest income collected | 145 | 208 | 740
Real Estate Portfolio Segment [Member] | Commercial Construction [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 466 | 9,537 | 6,888
Impaired balance with no related allowance | 466 | 3,428 | 1,897
Average recorded investment with no related allowance | 1,182 | 3,446 | 2,867
Interest income recognized with no related allowance | 4 | 6 | 26
Interest income collected with no related allowance | 3 | 7 | 27
Unpaid contractual principal balance with an allowance | 75 | 206 | 77
Impaired balance with an allowance | 75 | 134 | 77
Related allowance | 24 | 49 | 25
Average recorded investment with an allowance | 76 | 136 | 92
Unpaid contractual principal balance | 541 | 9,743 | 6,965
Impaired balance | 541 | 3,562 | 1,974
Average recorded investment | 1,258 | 3,582 | 2,959
Interest income recognized | 4 | 6 | 26
Interest income collected | 3 | 7 | 27
Real Estate Portfolio Segment [Member] | Residential [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 5,209 | 6,141 | 5,429
Impaired balance with no related allowance | 4,288 | 5,195 | 4,576
Average recorded investment with no related allowance | 4,432 | 6,397 | 4,715
Interest income recognized with no related allowance | 52 | 42 | 176
Interest income collected with no related allowance | 48 | 47 | 159
Unpaid contractual principal balance with an allowance | 971 | 1,209 | 1,083
Impaired balance with an allowance | 964 | 1,103 | 1,075
Related allowance | 528 | 330 | 308
Average recorded investment with an allowance | 1,019 | 1,584 | 1,089
Interest income recognized with an allowance | 1 | 13 | 16
Interest income collected with an allowance | 1 | 6 | 16
Unpaid contractual principal balance | 6,180 | 7,350 | 6,512
Impaired balance | 5,252 | 6,298 | 5,651
Average recorded investment | 5,451 | 7,981 | 5,804
Interest income recognized | 53 | 55 | 192
Interest income collected | 49 | 53 | 175
Real Estate Portfolio Segment [Member] | Farmland [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 1,328 | 1,419 | 1,105
Impaired balance with no related allowance | 1,327 | 1,417 | 1,103
Average recorded investment with no related allowance | 1,215 | 1,433 | 1,340
Interest income recognized with no related allowance | (4) | 3 | 1
Interest income collected with no related allowance |  | 3 | 2
Unpaid contractual principal balance with an allowance | 386 | 394 | 388
Impaired balance with an allowance | 386 | 394 | 388
Related allowance | 35 | 53 | 37
Average recorded investment with an allowance | 387 | 395 | 391
Interest income recognized with an allowance | 5 | 5 | 21
Interest income collected with an allowance | 5 | 5 | 21
Unpaid contractual principal balance | 1,714 | 1,813 | 1,493
Impaired balance | 1,713 | 1,811 | 1,491
Average recorded investment | 1,602 | 1,828 | 1,731
Interest income recognized | 1 | 8 | 22
Interest income collected | 5 | 8 | 23
Consumer and Other Portfolio Segment [Member] | Consumer [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 207 | 200 | 180
Impaired balance with no related allowance | 195 | 192 | 178
Average recorded investment with no related allowance | 187 | 197 | 191
Interest income recognized with no related allowance | 1 | 1 | 14
Interest income collected with no related allowance | 4 | 4 | 15
Unpaid contractual principal balance | 207 | 200 | 180
Impaired balance | 195 | 192 | 178
Average recorded investment | 187 | 197 | 191
Interest income recognized | 1 | 1 | 14
Interest income collected | 4 | 4 | $ 15
Consumer and Other Portfolio Segment [Member] | Other [Member] |  |  |
Unpaid contractual principal balance with no related allowance |  | 205 |
Impaired balance with no related allowance |  | 194 |
Average recorded investment with no related allowance |  | 195 | $ 48
Interest income recognized with no related allowance |  | 2 |
Interest income collected with no related allowance |  | 2 |
Unpaid contractual principal balance |  | 205 |
Impaired balance |  | 194 |
Average recorded investment |  | 195 | $ 48
Interest income recognized |  | 2 |
Interest income collected |  | 2 |
Unpaid contractual principal balance with no related allowance | 18,364 | 35,699 | 29,821
Impaired balance with no related allowance | 16,961 | 28,083 | 23,508
Average recorded investment with no related allowance | 20,235 | 28,787 | 25,289
Interest income recognized with no related allowance | 151 | 194 | 753
Interest income collected with no related allowance | 161 | 241 | 765
Unpaid contractual principal balance with an allowance | 8,740 | 7,366 | 10,640
Impaired balance with an allowance | 8,718 | 7,188 | 10,619
Related allowance | 2,531 | 735 | 2,073
Average recorded investment with an allowance | 9,668 | 8,009 | 8,345
Interest income recognized with an allowance | 56 | 63 | 253
Interest income collected with an allowance | 58 | 56 | 249
Unpaid contractual principal balance | 27,104 | 43,065 | 40,461
Impaired balance | 25,679 | 35,271 | 34,127
Average recorded investment | 29,903 | 36,796 | 33,634
Interest income recognized | 207 | 257 | 1,006
Interest income collected | $ 219 | $ 297 | $ 1,014

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