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ACQUISITIONS - Narrative (Details) $ / shares in Units, $ in Thousands |  | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 01, 2022 USD ($) banking_center $ / shares shares | Sep. 30, 2023 USD ($) $ / shares shares | Sep. 30, 2022 USD ($) | Dec. 31, 2022 USD ($) $ / shares shares
Business Acquisition [Line Items] |  |  |  |
Cash paid in acquisition |  | $ 0 | $ 79,324 |
Series A Preferred Stock |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Preferred Stock, issued (in shares) | shares |  | 10,000 |  | 10,000
Liquidation value per share (in dollars per share) | $ / shares |  | $ 2,500 |  | $ 2,500
Preferred Class B |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Entity listing, depository receipt ratio | 0.01 |  |  |
Preferred Class B | Level One |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Entity listing, depository receipt ratio | 0.01 |  |  |
Level One |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Percentage of interest acquired | 100.00% |  |  |
Number of banking centers | banking_center | 17 |  |  |
Exchange ratio | 0.7167 |  |  |
Cash payment per share (in dollars per share) | $ / shares | $ 10.17 |  |  |
Cash paid in acquisition | $ 79,300 |  |  |
Other intangibles | 18,642 |  |  |
Operating revenue |  |  |  | $ 56,900
Provision expense related to CECL Day 1 adjustments |  |  |  | 16,800
Acquisition-related expenses |  |  |  | $ 16,500
Level One | Other Intangible Assets |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Other intangibles | 18,600 |  |  |
Level One | Core Deposits |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Other intangibles | $ 17,200 |  |  |
Estimated life | 10 years |  |  |
Level One | Non-compete |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Other intangibles | $ 1,400 |  |  |
Estimated life | 2 years |  |  |
Level One | Common Stock |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Issuance of common stock related to acquisitions (in shares) | shares | 5,600,000 |  |  |
Level One | Series A Preferred Stock |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Preferred Stock, issued (in shares) | shares | 10,000 |  |  |
Dividend rate % | 7.50% |  |  |
Liquidation value per share (in dollars per share) | $ / shares | $ 2,500 |  |  |

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