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SUBORDINATED NOTES (Details) - USD ($) |  |  |  | 3 Months Ended
--- | --- | --- | --- | ---
Aug. 15, 2021 | Jun. 10, 2020 | Aug. 08, 2016 | Mar. 31, 2022 | Mar. 31, 2021
Subordinated Borrowing [Line Items] |  |  |  |  |
Public offering and sale of subordinated notes |  |  | $ 75,000,000.0 |  |
Subordinated note interest rate |  | 5.50% | 5.25% |  |
Amortization of debt discount (Premium) |  |  |  | $ 74,000 | $ 183,000
Subordinated borrowing, interest rate |  |  |  | 5.97% |
Senior Subordinated Notes |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |
Public offering and sale of subordinated notes |  | $ 75,000,000.0 |  |  |
Spread on variable rate |  | 5.325% |  |  |
Proceeds from issuance of senior long-term debt |  | $ 73,500,000 | $ 73,500,000 |  |
Payment of financing and stock issuance costs |  | $ 1,500,000 | $ 1,500,000 |  |
Expected life of the notes |  | 5 years | 5 years |  |
Principal amount redeemed | $ 75,000,000.0 |  |  |  |
Redemption price as percentage of aggregate principal balance | 100.00% |  |  |  |
Senior Subordinated Notes | 90-day LIBOR |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |
Spread on variable rate |  |  | 4.087% |  |

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