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SHAREHOLDERS’ EQUITY AND REGULATORY CAPITAL - Narrative (Detail) - USD ($) $ / shares in Units, $ in Millions |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jan. 24, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Apr. 19, 2021 | Sep. 30, 2015
Class of Stock [Line Items] |  |  |  |  |  |
Common stock reserved to be issued under dividend reinvestment and stock purchase plan (in shares) |  | 1,045,000 |  |  |  |
Shares available to be issued under the plan (in shares) |  | 665,000 |  |  |  |
Outstanding shares of common stock authorized to be repurchased (in shares) |  |  |  |  | 978,000 | 416,000
Number of additional shares authorized to be repurchased |  |  |  |  | 562,000 |
Shares repurchased under the program (in shares) |  | 818,941 |  |  |  |
Total cost of shares repurchased under the program |  | $ 18.7 |  |  |  |
Shares repurchased under the program, price per share (in dollars per share) |  | $ 22.78 |  |  |  |
Stock available for future repurchases (in shares) |  | 159,059 |  |  |  |
Stock available for future repurchases, percentage |  | 1.00% |  |  |  |
Cash dividend declared by the Board (in dollars per share) |  | $ 0.76 | $ 0.74 | $ 0.68 |  |
Amount available for dividend distribution |  | $ 45.9 |  |  |  |
Maximum amount available to loan nonbank affiliates |  | $ 29.3 | $ 27.9 |  |  |
Subsequent Event |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Cash dividend declared by the Board (in dollars per share) | $ 0.20 |  |  |  |  |

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