Note 5 - Allowance For Loan Losses and Credit Quality of Loans - Troubled Debt Restructurings (Details)
$ in Thousands |
12 Months Ended |
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
| Number of contracts |
13
|
15
|
| Pre-modification recorded principal balance |
$ 1,577
|
$ 1,702
|
| Post-modification recorded principal balance |
$ 1,008
|
$ 1,448
|
| Agriculture and Agricultural Real Estate Loans Portfolio Segment [Member] |
|
|
| Number of contracts |
1
|
3
|
| Pre-modification recorded principal balance |
$ 362
|
$ 325
|
| Post-modification recorded principal balance |
$ 325
|
$ 322
|
| Commercial Portfolio Segment [Member] |
|
|
| Number of contracts |
1
|
2
|
| Pre-modification recorded principal balance |
$ 250
|
$ 112
|
| Post-modification recorded principal balance |
|
$ 17
|
| Commercial Real Estate Portfolio Segment [Member] |
|
|
| Number of contracts |
1
|
3
|
| Pre-modification recorded principal balance |
$ 215
|
$ 684
|
| Post-modification recorded principal balance |
|
$ 593
|
| Construction Real Estate Portfolio Segment [Member] |
|
|
| Number of contracts |
|
|
| Pre-modification recorded principal balance |
|
|
| Post-modification recorded principal balance |
|
|
| Residential Portfolio Segment [Member] |
|
|
| Number of contracts |
9
|
7
|
| Pre-modification recorded principal balance |
$ 693
|
$ 581
|
| Post-modification recorded principal balance |
$ 629
|
$ 516
|
| Consumer and Other Portfolio Segment [Member] |
|
|
| Number of contracts |
1
|
|
| Pre-modification recorded principal balance |
$ 57
|
|
| Post-modification recorded principal balance |
$ 54
|
|