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STOCKHOLDERS' EQUITY (Tables) | 9 Months Ended
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Sep. 30, 2025
Equity [Abstract] |
Schedule of Common Stock Outstanding Roll Forward | A roll forward of common stock activity is presented in the following table: Number of Shares of Common Stock
| September 30, 2025 |  |
| Common Stock Outstanding |  |
| Class A |  | Class B |  |  |  |
Common stock - June 30, 2025 | 12,070,794 |  |  | 1,005,185 |  |  |  |  |
Shares repurchased under authorized repurchase plan | (457,350) |  |  | — |  |  |  |  |
Common stock - September 30, 2025 | 11,613,444 |  |  | 1,005,185 |  |  |  |  |
Common stock - December 31, 2024 | 12,712,436 |  |  | 1,005,185 |  |  |  |  |
Shares purchased under authorized repurchase plan | (1,098,992) |  |  | — |  |  |  |  |
Common stock - September 30, 2025 | 11,613,444 |  |  | 1,005,185 |  |  |  |  |
Schedule of Preferred Stock and Depositary Shares | The following table summarizes BancShares’ non-cumulative perpetual preferred stock: Preferred Stock
dollars in millions, except per share and par value data
Preferred Stock |  | Issuance Date |  | Earliest Redemption Date |  | Par Value |  | Shares Authorized, Issued and Outstanding |  |  |  |  |  | Liquidation Preference Per Share |  | Total Liquidation Preference |  | Dividend
Series A |  | March 12, 2020 |  | March 15, 2025 |  | $ | 0.01 |  |  | 345,000 |  |  |  |  |  | $ | 1,000 |  |  | $ | 345 |  |  | 5.375%
Series B (1) |  | January 3, 2022 |  | January 4, 2027 |  | 0.01 |  |  | 325,000 |  |  |  |  |  | 1,000 |  |  | 325 |  | SOFR + 3.972%
Series C |  | January 3, 2022 |  | January 4, 2027 |  | 0.01 |  |  | 8,000,000 |  |  |  |  |  | 25 |  |  | 200 |  | 5.625%
(1) Upon conversion to SOFR in 2023, BancShares began paying a credit spread adjustment in addition to the stated dividend.

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- Definition Schedule of Preferred Stock And Depositary Shares + References No definition available. + Details
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- Definition Tabular disclosure of the change in common stock outstanding. + References No definition available. + Details
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