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ACQUISITIONS AND DIVESTITURES - Narrative (Details) $ in Thousands | 1 Months Ended | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 30, 2021 USD ($) | Feb. 28, 2021 USD ($) | Dec. 31, 2021 USD ($) | Sep. 30, 2021 USD ($) | Jul. 31, 2021 USD ($) bankingCenter | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Noncontrolling interest |  |  | $ 975 |  |  | $ 0 |  |
Goodwill |  |  | 3,988 |  |  | $ 2,350 | $ 19,630 | $ 18,480
Disposal group, disposed of by sale |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Branch locations sold, number | bankingCenter |  |  |  |  | 4 |  |  |
Deposits assumed |  |  |  |  | $ 163,300 |  |  |
Loans of branches held for sale |  |  |  |  | $ 57,800 |  |  |
Gain on sale of banking centers |  |  | $ 10,800 | $ 10,800 |  |  |  |
Flexia |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Ownership percentage by noncontrolling owners |  | 20.00% |  |  |  |  |  |
Trabian |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Ownership percentage by noncontrolling owners | 20.00% |  |  |  |  |  |  |
Flexia |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Payments for software |  | $ 1,000 |  |  |  |  |  |
Flexia |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Ownership interest |  | 80.00% |  |  |  |  |  |
Purchase consideration |  | $ 2,500 |  |  |  |  |  |
Noncontrolling interest |  | $ 500 |  |  |  |  |  |
Trabian |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Ownership interest | 80.00% |  |  |  |  |  |  |
Purchase consideration | $ 1,600 |  |  |  |  |  |  |
Noncontrolling interest | 400 |  |  |  |  |  |  |
Assets acquired | 800 |  |  |  |  |  |  |
Liabilities assumed | 700 |  |  |  |  |  |  |
Goodwill | 1,600 |  |  |  |  |  |  |
Intangible assets assumed | $ 600 |  |  |  |  |  |  |

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