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FDIC-ASSISTED ACQUIRED LOANS (Details) - USD ($) | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020 | Jun. 09, 2017 | Apr. 26, 2016 | Jun. 20, 2014
Business Acquisition [Line Items] |  |  |  |  |
Goodwill recorded on acquisition date | $ 6,239,000 | $ 6,944,000 |  |  |
Team Bank |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Gross loans receivable | 4,273,000 | 5,393,000 |  |  |
Balance of accretable discount due to change in expected losses | (71,000) | (97,000) |  |  |
Expected loss remaining |  | (30,000) |  |  |
Net carrying value of loans receivable | 4,202,000 | 5,266,000 |  |  |
Goodwill recorded on acquisition date |  |  |  | $ 0 |
Vantus Bank |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Gross loans receivable | 5,972,000 | 8,052,000 |  |  |
Balance of accretable discount due to change in expected losses | (22,000) | (35,000) |  |  |
Expected loss remaining |  | (13,000) |  |  |
Net carrying value of loans receivable | 5,950,000 | 8,004,000 |  |  |
Goodwill recorded on acquisition date |  |  |  | 0 |
Sun Security Bank |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Gross loans receivable | 9,760,000 | 13,395,000 |  |  |
Balance of accretable discount due to change in expected losses | (80,000) | (180,000) |  |  |
Expected loss remaining |  | (104,000) |  |  |
Net carrying value of loans receivable | 9,680,000 | 13,111,000 |  |  |
Goodwill recorded on acquisition date |  |  |  | $ 0 |
Inter Bank |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Gross loans receivable | 34,812,000 | 44,215,000 |  |  |
Balance of accretable discount due to change in expected losses | (157,000) | (1,079,000) |  |  |
Expected loss remaining |  | (1,079,000) |  |  |
Net carrying value of loans receivable | 34,655,000 | 42,057,000 |  |  |
Goodwill recorded on acquisition date |  |  | $ 0 |  |
Valley Bank |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Gross loans receivable | 25,322,000 | 31,515,000 |  |  |
Balance of accretable discount due to change in expected losses | (276,000) | (612,000) |  |  |
Expected loss remaining |  | (699,000) |  |  |
Net carrying value of loans receivable | $ 25,046,000 | $ 30,204,000 |  |  |
Goodwill recorded on acquisition date |  |  |  |  | $ 0

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