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Loans and Allowance for Loan Losses, Activity in Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Dec. 31, 2018
Activity in allowance for loan losses [Roll Forward] |  |  |  |  |  |
Balance, beginning of period | $ 7,835 | $ 7,699 | $ 7,832 | $ 7,654 |  |
Charge-offs | (10) | (31) | (14) | (86) |  |
Recoveries | 11 | 34 | 18 | 34 |  |
Net recoveries (charge-offs) | 1 | 3 | 4 | (52) |  |
Provision (credit) for loan losses | 0 | 0 | 0 | 100 |  |
Balance, end of period | 7,836 | 7,702 | 7,836 | 7,702 |  |
Allowance Balance [Abstract] |  |  |  |  |  |
Ending balance, individually evaluated for impairment |  |  |  |  | $ 35 | $ 46
Ending balance, Collectively evaluated for impairment |  |  |  |  | 7,801 | 7,786
Total | 7,836 | 7,699 | 7,832 | 7,654 | 7,836 | 7,832
Gross Loans [Abstract] |  |  |  |  |  |
Ending balance, individually evaluated for impairment |  |  |  |  | 9,869 | 9,077
Ending balance, Collectively evaluated for impairment |  |  |  |  | 623,089 | 592,825
Total |  |  |  |  | 632,958 | 601,902
Construction & Development [Member] |  |  |  |  |  |
Activity in allowance for loan losses [Roll Forward] |  |  |  |  |  |
Balance, beginning of period | 1,290 | 1,465 | 1,136 | 1,407 |  |
Charge-offs | 0 | 0 | 0 | 0 |  |
Recoveries | 0 | 0 | 0 | 0 |  |
Net recoveries (charge-offs) | 0 | 0 | 0 | 0 |  |
Provision (credit) for loan losses | (259) | (182) | (105) | (124) |  |
Balance, end of period | 1,031 | 1,283 | 1,031 | 1,283 |  |
Allowance Balance [Abstract] |  |  |  |  |  |
Ending balance, individually evaluated for impairment |  |  |  |  | 0 | 0
Ending balance, Collectively evaluated for impairment |  |  |  |  | 1,031 | 1,136
Total | 1,290 | 1,465 | 1,136 | 1,407 | 1,031 | 1,136
Gross Loans [Abstract] |  |  |  |  |  |
Ending balance, individually evaluated for impairment |  |  |  |  | 0 | 0
Ending balance, Collectively evaluated for impairment |  |  |  |  | 83,291 | 87,267
Total |  |  |  |  | 83,291 | 87,267
1-4 Family Commercial [Member] |  |  |  |  |  |
Activity in allowance for loan losses [Roll Forward] |  |  |  |  |  |
Balance, beginning of period | 452 | 497 | 433 | 431 |  |
Charge-offs | 0 | (25) | 0 | (25) |  |
Recoveries | 1 | 2 | 2 | 2 |  |
Net recoveries (charge-offs) | 1 | (23) | 2 | (23) |  |
Provision (credit) for loan losses | (5) | (39) | 13 | 27 |  |
Balance, end of period | 448 | 435 | 448 | 435 |  |
Allowance Balance [Abstract] |  |  |  |  |  |
Ending balance, individually evaluated for impairment |  |  |  |  | 3 | 0
Ending balance, Collectively evaluated for impairment |  |  |  |  | 445 | 433
Total | 452 | 497 | 433 | 431 | 448 | 433
Gross Loans [Abstract] |  |  |  |  |  |
Ending balance, individually evaluated for impairment |  |  |  |  | 8 | 115
Ending balance, Collectively evaluated for impairment |  |  |  |  | 36,157 | 33,163
Total |  |  |  |  | 36,165 | 33,278
Commercial Real Estate - Other [Member] |  |  |  |  |  |
Activity in allowance for loan losses [Roll Forward] |  |  |  |  |  |
Balance, beginning of period | 2,087 | 1,556 | 2,035 | 1,865 |  |
Charge-offs | 0 | 0 | 0 | 0 |  |
Recoveries | 0 | 2 | 0 | 2 |  |
Net recoveries (charge-offs) |  | 2 | 0 | 2 |  |
Provision (credit) for loan losses | 242 | 414 | 294 | 105 |  |
Balance, end of period | 2,329 | 1,972 | 2,329 | 1,972 |  |
Allowance Balance [Abstract] |  |  |  |  |  |
Ending balance, individually evaluated for impairment |  |  |  |  | 32 | 32
Ending balance, Collectively evaluated for impairment |  |  |  |  | 2,297 | 2,003
Total | 2,087 | 1,556 | 2,035 | 1,865 | 2,329 | 2,035
Gross Loans [Abstract] |  |  |  |  |  |
Ending balance, individually evaluated for impairment |  |  |  |  | 1,911 | 484
Ending balance, Collectively evaluated for impairment |  |  |  |  | 186,231 | 155,912
Total |  |  |  |  | 188,142 | 156,396
Commercial & Industrial [Member] |  |  |  |  |  |
Activity in allowance for loan losses [Roll Forward] |  |  |  |  |  |
Balance, beginning of period | 3,068 | 3,108 | 3,231 | 2,779 |  |
Charge-offs | 0 | (6) | (4) | (61) |  |
Recoveries | 7 | 29 | 13 | 29 |  |
Net recoveries (charge-offs) | 7 | 23 | 9 | (32) |  |
Provision (credit) for loan losses | 96 | (118) | (69) | 266 |  |
Balance, end of period | 3,171 | 3,013 | 3,171 | 3,013 |  |
Allowance Balance [Abstract] |  |  |  |  |  |
Ending balance, individually evaluated for impairment |  |  |  |  | 0 | 14
Ending balance, Collectively evaluated for impairment |  |  |  |  | 3,171 | 3,217
Total | 3,068 | 3,108 | 3,231 | 2,779 | 3,171 | 3,231
Gross Loans [Abstract] |  |  |  |  |  |
Ending balance, individually evaluated for impairment |  |  |  |  | 5,309 | 7,381
Ending balance, Collectively evaluated for impairment |  |  |  |  | 250,791 | 241,013
Total |  |  |  |  | 256,100 | 248,394
Agricultural [Member] |  |  |  |  |  |
Activity in allowance for loan losses [Roll Forward] |  |  |  |  |  |
Balance, beginning of period | 760 | 872 | 818 | 1,015 |  |
Charge-offs | (10) | 0 | (10) | 0 |  |
Recoveries | 3 | 0 | 3 | 0 |  |
Net recoveries (charge-offs) | (7) | 0 | (7) | 0 |  |
Provision (credit) for loan losses | (58) | (64) | (116) | (207) |  |
Balance, end of period | 695 | 808 | 695 | 808 |  |
Allowance Balance [Abstract] |  |  |  |  |  |
Ending balance, individually evaluated for impairment |  |  |  |  | 0 | 0
Ending balance, Collectively evaluated for impairment |  |  |  |  | 695 | 818
Total | 760 | 872 | 818 | 1,015 | 695 | 818
Gross Loans [Abstract] |  |  |  |  |  |
Ending balance, individually evaluated for impairment |  |  |  |  | 2,641 | 1,097
Ending balance, Collectively evaluated for impairment |  |  |  |  | 53,526 | 61,747
Total |  |  |  |  | 56,167 | 62,844
Consumer [Member] |  |  |  |  |  |
Activity in allowance for loan losses [Roll Forward] |  |  |  |  |  |
Balance, beginning of period | 178 | 201 | 179 | 157 |  |
Charge-offs | 0 | 0 | 0 | 0 |  |
Recoveries | 0 | 1 | 0 | 1 |  |
Net recoveries (charge-offs) | 0 | 1 | 0 | 1 |  |
Provision (credit) for loan losses | (16) | (11) | (17) | 33 |  |
Balance, end of period | 162 | 191 | 162 | 191 |  |
Allowance Balance [Abstract] |  |  |  |  |  |
Ending balance, individually evaluated for impairment |  |  |  |  | 0 | 0
Ending balance, Collectively evaluated for impairment |  |  |  |  | 162 | 179
Total | $ 178 | $ 201 | $ 179 | $ 157 | 162 | 179
Gross Loans [Abstract] |  |  |  |  |  |
Ending balance, individually evaluated for impairment |  |  |  |  | 0 | 0
Ending balance, Collectively evaluated for impairment |  |  |  |  | 13,093 | 13,723
Total |  |  |  |  | $ 13,093 | $ 13,723

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