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Loans - Delinquent Loans (Details) | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2021 USD ($) payment | Dec. 31, 2020 USD ($) | Sep. 30, 2020 USD ($)
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | $ 807,937,000 | $ 655,411,000 | $ 661,482,000
Accruing Loans 90 or More Days Past Due | $ 318,000 | 513,000 |
Minimum period of default | 90 days |  |
Number of monthly payments to demonstrate repayment ability | payment | 6 |  |
Undisbursed commitments | $ 0 | 0 |
Total nonaccrual loans | 11,551,000 | 11,496,000 |
Commercial and Industrial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 51,135,000 | 47,514,000 | 65,742,000
Accruing Loans 90 or More Days Past Due | 0 | 0 |
Total nonaccrual loans | 0 | 0 |
Commercial and Industrial | Commercial and business loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 44,713,000 | 37,349,000 | 39,218,000
Accruing Loans 90 or More Days Past Due | 0 | 0 |
Total nonaccrual loans | 0 | 0 |
Commercial and Industrial | Government program loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 6,422,000 | 10,165,000 | 26,524,000
Accruing Loans 90 or More Days Past Due | 0 | 0 |
Total nonaccrual loans | 0 | 0 |
Real estate mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 481,930,000 | 320,294,000 | 309,849,000
Accruing Loans 90 or More Days Past Due | 0 | 0 |
Total nonaccrual loans | 0 | 0 |
Real estate mortgage | Commercial real estate |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 309,727,000 | 282,951,000 | 264,013,000
Accruing Loans 90 or More Days Past Due | 0 | 0 |
Total nonaccrual loans | 0 | 0 |
Real estate mortgage | Residential mortgages |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 172,120,000 | 37,236,000 | 45,722,000
Accruing Loans 90 or More Days Past Due | 0 | 0 |
Total nonaccrual loans | 0 | 0 |
Real estate mortgage | Home improvement and home equity loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 83,000 | 107,000 | 114,000
Accruing Loans 90 or More Days Past Due | 0 | 0 |
Total nonaccrual loans | 0 | 0 |
Real estate construction and development |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 165,370,000 | 175,016,000 | 171,889,000
Accruing Loans 90 or More Days Past Due | 0 | 0 |
Total nonaccrual loans | 11,273,000 | 11,057,000 |
Agricultural loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 56,091,000 | 51,079,000 | 51,587,000
Accruing Loans 90 or More Days Past Due | 0 | 0 |
Total nonaccrual loans | 278,000 | 439,000 |
Installment and student loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 53,411,000 | 61,508,000 | $ 62,415,000
Accruing Loans 90 or More Days Past Due | 318,000 | 513,000 |
Total nonaccrual loans | 0 | 0 |
Total Past Due Loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 13,621,000 | 11,126,000 |
Total Past Due Loans | Commercial and Industrial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 184,000 |
Total Past Due Loans | Commercial and Industrial | Commercial and business loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 184,000 |
Total Past Due Loans | Commercial and Industrial | Government program loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
Total Past Due Loans | Real estate mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 3,408,000 | 0 |
Total Past Due Loans | Real estate mortgage | Commercial real estate |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
Total Past Due Loans | Real estate mortgage | Residential mortgages |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 3,395,000 | 0 |
Total Past Due Loans | Real estate mortgage | Home improvement and home equity loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 13,000 | 0 |
Total Past Due Loans | Real estate construction and development |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 8,988,000 | 8,605,000 |
Total Past Due Loans | Agricultural loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 236,000 | 439,000 |
Total Past Due Loans | Installment and student loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 989,000 | 1,898,000 |
Current Loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 794,316,000 | 644,285,000 |
Current Loans | Commercial and Industrial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 51,135,000 | 47,330,000 |
Current Loans | Commercial and Industrial | Commercial and business loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 44,713,000 | 37,165,000 |
Current Loans | Commercial and Industrial | Government program loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 6,422,000 | 10,165,000 |
Current Loans | Real estate mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 478,522,000 | 320,294,000 |
Current Loans | Real estate mortgage | Commercial real estate |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 309,727,000 | 282,951,000 |
Current Loans | Real estate mortgage | Residential mortgages |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 168,725,000 | 37,236,000 |
Current Loans | Real estate mortgage | Home improvement and home equity loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 70,000 | 107,000 |
Current Loans | Real estate construction and development |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 156,382,000 | 166,411,000 |
Current Loans | Agricultural loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 55,855,000 | 50,640,000 |
Current Loans | Installment and student loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 52,422,000 | 59,610,000 |
Loans 30-60 Days Past Due |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 3,873,000 | 694,000 |
Loans 30-60 Days Past Due | Commercial and Industrial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 184,000 |
Loans 30-60 Days Past Due | Commercial and Industrial | Commercial and business loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 184,000 |
Loans 30-60 Days Past Due | Commercial and Industrial | Government program loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
Loans 30-60 Days Past Due | Real estate mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 3,408,000 | 0 |
Loans 30-60 Days Past Due | Real estate mortgage | Commercial real estate |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
Loans 30-60 Days Past Due | Real estate mortgage | Residential mortgages |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 3,395,000 | 0 |
Loans 30-60 Days Past Due | Real estate mortgage | Home improvement and home equity loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 13,000 | 0 |
Loans 30-60 Days Past Due | Real estate construction and development |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
Loans 30-60 Days Past Due | Agricultural loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
Loans 30-60 Days Past Due | Installment and student loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 465,000 | 510,000 |
Loans 61-89 Days Past Due |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 206,000 | 875,000 |
Loans 61-89 Days Past Due | Commercial and Industrial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
Loans 61-89 Days Past Due | Commercial and Industrial | Commercial and business loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
Loans 61-89 Days Past Due | Commercial and Industrial | Government program loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
Loans 61-89 Days Past Due | Real estate mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
Loans 61-89 Days Past Due | Real estate mortgage | Commercial real estate |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
Loans 61-89 Days Past Due | Real estate mortgage | Residential mortgages |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
Loans 61-89 Days Past Due | Real estate mortgage | Home improvement and home equity loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
Loans 61-89 Days Past Due | Real estate construction and development |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
Loans 61-89 Days Past Due | Agricultural loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
Loans 61-89 Days Past Due | Installment and student loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 206,000 | 875,000 |
91 - 120 days |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 9,542,000 | 9,557,000 |
91 - 120 days | Commercial and Industrial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
91 - 120 days | Commercial and Industrial | Commercial and business loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
91 - 120 days | Commercial and Industrial | Government program loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
91 - 120 days | Real estate mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
91 - 120 days | Real estate mortgage | Commercial real estate |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
91 - 120 days | Real estate mortgage | Residential mortgages |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
91 - 120 days | Real estate mortgage | Home improvement and home equity loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 0 | 0 |
91 - 120 days | Real estate construction and development |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 8,988,000 | 8,605,000 |
91 - 120 days | Agricultural loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | 236,000 | 439,000 |
91 - 120 days | Installment and student loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Loans | $ 318,000 | $ 513,000 |

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