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Loan and Allowance for Loan Losses (Tables) | 9 Months Ended
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Sep. 30, 2018
Loans And Leases Receivable Disclosure [Abstract] |
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] |
|  |  |  |  |  |  | September 30, |  |  | December 31,
(In thousands) |  |  | 2018 |  |  | 2017
Commercial and industrial |  | $ | 52,430 |  | $ | 59,086
Construction and land development |  |  | 45,109 |  |  | 39,607
Commercial real estate: |  |  |  |  |  |
| Owner occupied |  |  | 51,846 |  |  | 44,192
| Multi-family |  |  | 40,753 |  |  | 52,167
| Other |  |  | 157,551 |  |  | 142,674
|  | Total commercial real estate |  |  | 250,150 |  |  | 239,033
Residential real estate: |  |  |  |  |  |
| Consumer mortgage |  |  | 57,143 |  |  | 59,540
| Investment property |  |  | 46,186 |  |  | 47,323
|  | Total residential real estate |  |  | 103,329 |  |  | 106,863
Consumer installment |  |  | 9,942 |  |  | 9,588
|  | Total loans |  |  | 460,960 |  |  | 454,177
Less: unearned income |  |  | (633) |  |  | (526)
|  | Loans, net of unearned income |  | $ | 460,327 |  | $ | 453,651
Past Due Financing Receivables [Table Text Block] |
|  |  |  |  |  |  |  |  | Accruing | Accruing | Total |  |  |  |
|  |  |  |  |  |  |  |  | 30-89 Days | Greater than | Accruing | Non- |  |  | Total
(In thousands) |  | Current | Past Due | 90 days | Loans | Accrual |  |  | Loans
September 30, 2018: |  |  |  |  |  |  |  |  |  |
Commercial and industrial |  | $ | 52,420 | 10 | — | 52,430 | — |  | $ | 52,430
Construction and land development |  |  | 44,832 | 241 | — | 45,073 | 36 |  |  | 45,109
Commercial real estate: |  |  |  |  |  |  |  |  |  |
| Owner occupied |  |  | 51,846 | — | — | 51,846 | — |  |  | 51,846
| Multi-family |  |  | 40,753 | — | — | 40,753 | — |  |  | 40,753
| Other |  |  | 156,855 | — | — | 156,855 | 696 |  |  | 157,551
|  | Total commercial real estate |  |  | 249,454 | — | — | 249,454 | 696 |  |  | 250,150
Residential real estate: |  |  |  |  |  |  |  |  |  |
| Consumer mortgage |  |  | 56,889 | 60 | — | 56,949 | 194 |  |  | 57,143
| Investment property |  |  | 46,060 | 126 | — | 46,186 | - |  |  | 46,186
|  | Total residential real estate |  |  | 102,949 | 186 | — | 103,135 | 194 |  |  | 103,329
Consumer installment |  |  | 9,917 | 17 | — | 9,934 | 8 |  |  | 9,942
|  | Total |  | $ | 459,572 | 454 | — | 460,026 | 934 |  | $ | 460,960
December 31, 2017: |  |  |  |  |  |  |  |  |  |
Commercial and industrial |  | $ | 59,047 | 8 | — | 59,055 | 31 |  | $ | 59,086
Construction and land development |  |  | 39,607 | — | — | 39,607 | — |  |  | 39,607
Commercial real estate: |  |  |  |  |  |  |  |  |  |
| Owner occupied |  |  | 44,192 | — | — | 44,192 | — |  |  | 44,192
| Multi-family |  |  | 52,167 | — | — | 52,167 | — |  |  | 52,167
| Other |  |  | 140,486 | — | — | 140,486 | 2,188 |  |  | 142,674
|  | Total commercial real estate |  |  | 236,845 | — | — | 236,845 | 2,188 |  |  | 239,033
Residential real estate: |  |  |  |  |  |  |  |  |  |
| Consumer mortgage |  |  | 58,195 | 746 | — | 58,941 | 599 |  |  | 59,540
| Investment property |  |  | 46,871 | 312 | — | 47,183 | 140 |  |  | 47,323
|  | Total residential real estate |  |  | 105,066 | 1,058 | — | 106,124 | 739 |  |  | 106,863
Consumer installment |  |  | 9,517 | 57 | — | 9,574 | 14 |  |  | 9,588
|  | Total |  | $ | 450,082 | 1,123 | — | 451,205 | 2,972 |  | $ | 454,177
Allowance for Credit Losses on Financing Receivables [Table Text Block] |
|  |  | September 30, 2018
(In thousands) | Commercial and industrial |  | Construction and land development |  | Commercial real estate |  | Residential real estate |  | Consumer installment |  |  |  | Total
Quarter ended: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance | $ | 600 |  | 787 |  | 2,197 |  | 1,017 |  | 149 |  |  | $ | 4,750
Charge-offs |  | — |  | — |  | — |  | (11) |  | (7) |  |  |  | (18)
Recoveries |  | 13 |  | — |  | — |  | 19 |  | 21 |  |  |  | 53
| Net recoveries |  | 13 |  | — |  | — |  | 8 |  | 14 |  |  |  | 35
Provision for loan losses |  | (69) |  | 49 |  | 44 |  | (28) |  | 4 |  |  |  | —
Ending balance | $ | 544 |  | 836 |  | 2,241 |  | 997 |  | 167 |  |  | $ | 4,785
Nine months ended: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance | $ | 653 |  | 734 |  | 2,126 |  | 1,071 |  | 173 |  |  | $ | 4,757
Charge-offs |  | (52) |  | — |  | (39) |  | (15) |  | (9) |  |  |  | (115)
Recoveries |  | 59 |  | — |  | — |  | 52 |  | 32 |  |  |  | 143
| Net recoveries (charge-offs) |  | 7 |  | — |  | (39) |  | 37 |  | 23 |  |  |  | 28
Provision for loan losses |  | (116) |  | 102 |  | 154 |  | (111) |  | (29) |  |  |  | —
Ending balance | $ | 544 |  | 836 |  | 2,241 |  | 997 |  | 167 |  |  | $ | 4,785
|  |  | September 30, 2017
(In thousands) | Commercial and industrial |  | Construction and land development |  | Commercial real estate |  | Residential real estate |  | Consumer installment |  |  |  | Total
Quarter ended: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance | $ | 677 |  | 874 |  | 2,121 |  | 1,119 |  | 174 |  |  | $ | 4,965
Charge-offs |  | (449) |  | — |  | — |  | (30) |  | (10) |  |  |  | (489)
Recoveries |  | 39 |  | 133 |  | — |  | 20 |  | 2 |  |  |  | 194
| Net (charge-offs) recoveries |  | (410) |  | 133 |  | — |  | (10) |  | (8) |  |  |  | (295)
Provision for loan losses |  | 237 |  | (156) |  | (60) |  | (32) |  | 11 |  |  |  | —
Ending balance | $ | 504 |  | 851 |  | 2,061 |  | 1,077 |  | 177 |  |  | $ | 4,670
Nine months ended: |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance | $ | 540 |  | 812 |  | 2,071 |  | 1,107 |  | 113 |  |  | $ | 4,643
Charge-offs |  | (449) |  | — |  | — |  | (108) |  | (16) |  |  |  | (573)
Recoveries |  | 45 |  | 347 |  | — |  | 97 |  | 11 |  |  |  | 500
| Net (charge-offs) recoveries |  | (404) |  | 347 |  | — |  | (11) |  | (5) |  |  |  | (73)
Provision for loan losses |  | 368 |  | (308) |  | (10) |  | (19) |  | 69 |  |  |  | 100
Ending balance | $ | 504 |  | 851 |  | 2,061 |  | 1,077 |  | 177 |  |  | $ | 4,670
Financing Receivable Allowance for Credit Loss Additional Information [Table Text Block] |
|  |  |  |  |  |  | Collectively evaluated (1) |  | Individually evaluated (2) |  | Total
|  |  |  |  |  |  | Allowance | Recorded |  | Allowance | Recorded |  | Allowance | Recorded
|  |  |  |  |  |  | for loan | investment |  | for loan | investment |  | for loan | investment
(In thousands) |  | losses | in loans |  | losses | in loans |  | losses | in loans
September 30, 2018: |  |  |  |  |  |  |  |  |
Commercial and industrial | $ | 544 | 52,430 |  | — | — |  | 544 | 52,430
Construction and land development |  | 836 | 45,109 |  | — | — |  | 836 | 45,109
Commercial real estate |  | 2,241 | 249,292 |  | — | 858 |  | 2,241 | 250,150
Residential real estate |  | 997 | 103,329 |  | — | — |  | 997 | 103,329
Consumer installment |  | 167 | 9,942 |  | — | — |  | 167 | 9,942
|  | Total | $ | 4,785 | 460,102 |  | — | 858 |  | 4,785 | 460,960
September 30, 2017: |  |  |  |  |  |  |  |  |
Commercial and industrial | $ | 471 | 50,068 |  | 33 | 33 |  | 504 | 50,101
Construction and land development |  | 851 | 47,455 |  | — | — |  | 851 | 47,455
Commercial real estate |  | 2,045 | 229,700 |  | 16 | 2,680 |  | 2,061 | 232,380
Residential real estate |  | 1,077 | 110,159 |  | — | — |  | 1,077 | 110,159
Consumer installment |  | 177 | 9,877 |  | — | — |  | 177 | 9,877
|  | Total | $ | 4,621 | 447,259 |  | 49 | 2,713 |  | 4,670 | 449,972
(1) | Represents loans collectively evaluated for impairment in accordance with ASC 450-20, Loss Contingencies (formerly FAS 5), and
| pursuant to amendments by ASU 2010-20 regarding allowance for non-impaired loans.
(2) | Represents loans individually evaluated for impairment in accordance with ASC 310-30, Receivables (formerly FAS 114), and
| pursuant to amendments by ASU 2010-20 regarding allowance for impaired loans.
Financing Receivable Credit Quality Indicators [Table Text Block] |
(In thousands) |  | Pass |  | Special Mention |  | Substandard Accruing |  | Nonaccrual |  |  | Total loans
September 30, 2018: |  |  |  |  |  |  |  |  |  |  |
Commercial and industrial | $ | 50,137 |  | 2,197 |  | 96 |  | — |  | $ | 52,430
Construction and land development |  | 44,257 |  | 53 |  | 763 |  | 36 |  |  | 45,109
Commercial real estate: |  |  |  |  |  |  |  |  |  |  |
| Owner occupied |  | 51,138 |  | 387 |  | 321 |  | — |  |  | 51,846
| Multi-family |  | 40,753 |  | — |  | — |  | — |  |  | 40,753
| Other |  | 155,490 |  | 988 |  | 377 |  | 696 |  |  | 157,551
|  | Total commercial real estate |  | 247,381 |  | 1,375 |  | 698 |  | 696 |  |  | 250,150
Residential real estate: |  |  |  |  |  |  |  |  |  |  |
| Consumer mortgage |  | 51,236 |  | 2,439 |  | 3,274 |  | 194 |  |  | 57,143
| Investment property |  | 45,231 |  | 204 |  | 751 |  | - |  |  | 46,186
|  | Total residential real estate |  | 96,467 |  | 2,643 |  | 4,025 |  | 194 |  |  | 103,329
Consumer installment |  | 9,786 |  | 79 |  | 69 |  | 8 |  |  | 9,942
|  | Total | $ | 448,028 |  | 6,347 |  | 5,651 |  | 934 |  | $ | 460,960
December 31, 2017: |  |  |  |  |  |  |  |  |  |  |
Commercial and industrial | $ | 58,842 |  | 94 |  | 119 |  | 31 |  | $ | 59,086
Construction and land development |  | 39,049 |  | 90 |  | 468 |  | — |  |  | 39,607
Commercial real estate: |  |  |  |  |  |  |  |  |  |  |
| Owner occupied |  | 43,615 |  | 240 |  | 337 |  | — |  |  | 44,192
| Multi-family |  | 52,167 |  | — |  | — |  | — |  |  | 52,167
| Other |  | 139,695 |  | 395 |  | 396 |  | 2,188 |  |  | 142,674
|  | Total commercial real estate |  | 235,477 |  | 635 |  | 733 |  | 2,188 |  |  | 239,033
Residential real estate: |  |  |  |  |  |  |  |  |  |  |
| Consumer mortgage |  | 54,101 |  | 1,254 |  | 3,586 |  | 599 |  |  | 59,540
| Investment property |  | 46,463 |  | 53 |  | 667 |  | 140 |  |  | 47,323
|  | Total residential real estate |  | 100,564 |  | 1,307 |  | 4,253 |  | 739 |  |  | 106,863
Consumer installment |  | 9,430 |  | 66 |  | 78 |  | 14 |  |  | 9,588
|  | Total | $ | 443,362 |  | 2,192 |  | 5,651 |  | 2,972 |  | $ | 454,177
Impaired Financing Receivables [Table Text Block] |
|  |  |  |  |  |  | September 30, 2018
(In thousands) |  | Unpaid principal balance (1) | Charge-offs and payments applied (2) | Recorded investment (3) |  |  | Related allowance
With no allowance recorded:
Commercial real estate: |  |  |  |  |  |  |
| Owner occupied | $ | 162 | — | 162 |  |  |
| Other |  | 753 | (57) | 696 |  |  |
|  | Total commercial real estate |  | 915 | (57) | 858 |  |  |
|  | Total impaired loans | $ | 915 | (57) | 858 |  | $ | —
(1) Unpaid principal balance represents the contractual obligation due from the customer.
(2) Charge-offs and payments applied represents cumulative charge-offs taken, as well as interest payments that have been
| applied against the outstanding principal balance subsequent to the loans being placed on nonaccrual status.
(3) Recorded investment represents the unpaid principal balance less charge-offs and payments applied; it is shown before
| any related allowance for loan losses.
|  |  |  |  |  |  | December 31, 2017
(In thousands) |  | Unpaid principal balance (1) | Charge-offs and payments applied (2) | Recorded investment (3) |  |  | Related allowance
With no allowance recorded:
Commercial real estate: |  |  |  |  |  |  |
| Other | $ | 3,630 | (1,094) | 2,536 |  |  |
|  | Total commercial real estate |  | 3,630 | (1,094) | 2,536 |  |  |
|  | Total | $ | 3,630 | (1,094) | 2,536 |
With allowance recorded: |
Commercial and industrial | $ | 52 | (21) | 31 |  | $ | 31
Commercial real estate: |  |  |  |  |  |  |
| Owner occupied |  | 175 | — | 175 |  |  | 11
|  | Total commercial real estate |  | 175 | — | 175 |  |  | 11
|  | Total |  | 227 | (21) | 206 |  |  | 42
|  | Total impaired loans | $ | 3,857 | (1,115) | 2,742 |  | $ | 42
(1) Unpaid principal balance represents the contractual obligation due from the customer.
(2) Charge-offs and payments applied represents cumulative charge-offs taken, as well as interest payments that have been
| applied against the outstanding principal balance subsequent to the loans being placed on nonaccrual status.
(3) Recorded investment represents the unpaid principal balance less charge-offs and payments applied; it is shown before
| any related allowance for loan losses.
Schedule Of Average Impaired Financing Receivable [Table Text Block] |
|  |  |  |  |  |  | Quarter ended September 30, 2018 |  | Nine months ended September 30, 2018
|  |  |  |  |  |  | Average |  | Total interest |  | Average |  | Total interest
|  |  |  |  |  |  | recorded |  | income |  | recorded |  | income
(In thousands) |  | investment |  | recognized |  | investment |  | recognized
Impaired loans:
Commercial and industrial | $ | — |  | — |  | 12 |  | —
Commercial real estate: |  |  |  |  |  |  |  |
| Owner occupied |  | 164 |  | 2 |  | 168 |  | 7
| Other |  | 701 |  | — |  | 1,488 |  | —
|  | Total commercial real estate |  | 865 |  | 2 |  | 1,656 |  | 7
|  | Total | $ | 865 |  | 2 |  | 1,668 |  | 7
|  |  |  |  |  |  | Quarter ended September 30, 2017 |  | Nine months ended September 30, 2017
|  |  |  |  |  |  | Average |  | Total interest |  | Average |  | Total interest
|  |  |  |  |  |  | recorded |  | income |  | recorded |  | income
(In thousands) |  | investment |  | recognized |  | investment |  | recognized
Impaired loans:
Commercial and industrial | $ | 126 |  | — |  | 55 |  | —
Construction and land development |  | — |  | — |  | 15 |  | —
Commercial real estate: |  |  |  |  |  |  |  |
| Owner occupied |  | 182 |  | 2 |  | 186 |  | 8
| Other |  | 2,148 |  | — |  | 1,971 |  | —
|  | Total commercial real estate |  | 2,330 |  | 2 |  | 2,157 |  | 8
|  | Total | $ | 2,456 |  | 2 |  | 2,227 |  | 8
Troubled Debt Restructurings on Financing Receivables, Accrual Status [Table Text Block] |
|  |  |  |  |  |  | TDRs
|  |  |  |  |  |  |  |  |  |  |  | Related
(In thousands) |  | Accruing | Nonaccrual | Total |  |  | Allowance
September 30, 2018 |  |  |  |  |  |  |
Commercial real estate: |  |  |  |  |  |  |
| Owner occupied | $ | 162 | — | 162 |  | $ | —
| Other |  | — | 696 | 696 |  |  | —
|  | Total commercial real estate |  | 162 | 696 | 858 |  |  | —
|  | Total | $ | 162 | 696 | 858 |  | $ | —
December 31, 2017 |  |
Commercial and industrial | $ | — | 31 | 31 |  | $ | 31
Commercial real estate: |  |  |  |  |  |  |
| Owner occupied |  | 175 | — | 175 |  |  | 11
| Other |  | 287 | 1,431 | 1,718 |  |  | —
|  | Total commercial real estate |  | 462 | 1,431 | 1,893 |  |  | 11
|  | Total | $ | 462 | 1,462 | 1,924 |  | $ | 42
Troubled Debt Restructuring Modifications [Table Text Block] |
|  |  |  |  |  | Quarter ended September 30, |  |  | Nine Months ended September 30,
|  |  |  |  |  |  |  |  | Pre- |  | Post - |  |  |  |  |  | Pre- |  | Post -
|  |  |  |  |  |  |  |  | modification |  | modification |  |  |  |  |  | modification |  | modification
|  |  |  |  |  | Number |  |  | outstanding |  | outstanding |  |  | Number |  |  | outstanding |  | outstanding
|  |  |  |  |  | of |  |  | recorded |  | recorded |  |  | of |  |  | recorded |  | recorded
(Dollars in thousands) | contracts |  |  | investment |  | investment |  |  | contracts |  |  | investment |  | investment
2018: |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial real estate: |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Other | 1 |  | $ | 710 |  | 710 |  |  | 2 |  | $ | 1,447 |  | 1,447
|  | Total commercial real estate | 1 |  |  | 710 |  | 710 |  |  | 2 |  |  | 1,447 |  | 1,447
|  | Total | 1 |  | $ | 710 |  | 710 |  |  | 2 |  | $ | 1,447 |  | 1,447
2017: |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial and industrial | 1 |  | $ | 34 |  | 34 |  |  | 1 |  | $ | 34 |  | 34
Commercial real estate: |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Other | — |  |  | — |  | — |  |  | 1 |  |  | 1,275 |  | 1,266
|  | Total commercial real estate | — |  |  | — |  | — |  |  | 1 |  |  | 1,275 |  | 1,266
|  | Total | 1 |  | $ | 34 |  | 34 |  |  | 2 |  | $ | 1,309 |  | 1,300
Schedule Of Debtor Troubled Debt Restructuring, Subsequent Defaults [Table Text Block] |
|  |  |  |  |  | Quarter ended September 30, |  |  | Nine Months ended September 30,
|  |  |  |  |  | Number of |  |  | Recorded |  |  |  | Number of |  |  | Recorded |
(Dollars in thousands) | Contracts |  |  | investment(1) |  |  |  | Contracts |  |  | investment(1) |
2018: |  |  |  |  |  |  |  |  |  |  |  |
Commercial real estate: |  |  |  |  |  |  |  |  |  |  |  |
| Other | — |  | $ | — |  |  |  | 1 |  | $ | 1,259 |
|  | Total commercial real estate | — |  |  | — |  |  |  | 1 |  |  | 1,259 |
|  | Total | — |  | $ | — |  |  |  | 1 |  | $ | 1,259 |
(1) Amount as of applicable month end during the respective period for which there was a payment default. |

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- Definition Tabular disclosure of financing receivables (examples of financing receivables include loans, trade accounts receivable and notes receivable) and activity in the allowance for credit losses account. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 55 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=82894031&loc=SL6953803-111525 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953659-111524 + Details
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- Definition Tabular disclosure of financing receivables that are past due but not impaired, financing receivables that are 90 days past due and still accruing, and financing receivables on nonaccrual status. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524 + Details
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