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BORROWED FUNDS - Subordinated Debt (Details) - USD ($) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Nov. 30, 2020 | Jun. 30, 2014 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2007
Subordinated Debt |  |  |  |  |  |  |
Balance at end of year |  |  |  | $ 73,030,000 | $ 43,407,000 |  |
Subordinated debt redemption |  |  |  |  |  | $ 12,400,000 |
Interest expense on borrowed funds |  |  |  | 2,188,000 | 261,000 | 770,000 |
Subordinated Debt |  |  |  |  |  |  |
Subordinated Debt |  |  |  |  |  |  |
Balance at end of year |  |  |  | 73,030,000 | 43,407,000 |  |
Average balance during the year |  |  |  | 51,149,000 | 7,568,000 |  |
Maximum month-end balance |  |  |  | $ 73,030,000 | $ 43,524,000 |  |
Weighted-average rate during the year |  |  |  | 4.28% | 3.45% |  |
Weighted-average rate at December 31 |  |  |  | 3.71% | 4.02% |  |
Face amount of debt issued | $ 30,000,000 | $ 40,000,000 |  |  |  |  |
Term of debt instrument | 10 years | 10 years |  |  |  |  |
Interest rate on debt security | 3.25% | 4.25% |  |  |  |  |
Subordinated debt converted, amount |  |  |  |  |  | $ 1,000,000 |
Subordinated debt converted into common stock (in shares) |  |  |  |  |  | 62,500 |
Annual interest expense savings |  |  |  |  |  | $ 1,000,000 |
Interest expense on borrowed funds |  |  |  | $ 2,200,000 | $ 300,000 | $ 800,000 |
SOFR | Subordinated Debt |  |  |  |  |  |  |
Subordinated Debt |  |  |  |  |  |  |
Variable rate basis spread |  | 4.01% |  |  |  |  |
Subordinated Debentures | Subordinated Debt |  |  |  |  |  |  |
Subordinated Debt |  |  |  |  |  |  |
Face amount of debt issued |  |  |  |  |  |  | $ 4,000,000
Subordinated Debentures | LIBOR | Subordinated Debt |  |  |  |  |  |  |
Subordinated Debt |  |  |  |  |  |  |
Variable rate basis spread |  |  |  | 1.62% |  |  |
Convertible Subordinated Promissory Notes Due 2024 | Subordinated Debt |  |  |  |  |  |  |
Subordinated Debt |  |  |  |  |  |  |
Face amount of debt issued |  |  | $ 29,400,000 |  |  |  |
Term of debt instrument |  |  | 10 years |  |  |  |
Debt instrument, investment amount of holder |  |  | $ 100,000 |  |  |  |
Debt instrument, minimum ownership of common stock as percentage of principal acquired |  |  | $ 1,000,000 |  |  |  |

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- Definition The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4332-108586 + Details
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