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STOCKHOLDERS' EQUITY (Tables) | 12 Months Ended
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Dec. 31, 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
| December 31, 2025 |  | December 31, 2024
| Common Stock Outstanding |  | Common Stock Outstanding
| Class A |  | Class B |  | Class A |  | Class B
Common stock - beginning of period | 12,712,436 |  |  | 1,005,185 |  |  | 13,514,933 |  |  | 1,005,185 |
Shares purchased under authorized repurchase plan | (1,578,462) |  |  | — |  |  | (814,641) |  |  | — |
Restricted stock units vested, net of shares held to cover taxes | — |  |  | — |  |  | 12,144 |  |  | — |
Common stock - end of period | 11,133,974 |  |  | 1,005,185 |  |  | 12,712,436 |  |  | 1,005,185 |
Schedule of Preferred Stock and Depositary Shares | As of December 31, 2025, the Parent Company had Series A, Series B, Series C, and Series D non-cumulative perpetual preferred stock (together, “BancShares Preferred Stock”) as summarized in the following table: Preferred Stock
dollars in millions, except per share, depositary share, and per depositary share data
Preferred Stock |  | Issuance Date |  | Earliest Redemption Date |  | Book Value (1) |  | Par Value Per Share |  | Shares Authorized, Issued and Outstanding |  |  |  |  |  | Aggregate Liquidation Preference |  | Liquidation Preference Per Share |  | Depositary Shares (Fractional Interest) (2) |  | Liquidation Preference Per Depositary Share |  | Dividend
Series A |  | March 12, 2020 |  | March 15, 2025 |  | $ | 340 |  |  | $ | 0.01 |  |  | 345,000 |  |  |  |  |  | $ | 345 |  |  | $ | 1,000 |  |  | 13,800,000 (1/40 th) |  | $ | 25 |  |  | 5.375 | %
Series B (3) |  | January 3, 2022 |  | January 4, 2027 |  | 334 |  | 0.01 |  |  | 325,000 |  |  |  |  |  | 325 |  | 1,000 |  |  | n/a |  | n/a |  | SOFR + 3.972%
Series C |  | January 3, 2022 |  | January 4, 2027 |  | 207 |  | 0.01 |  |  | 8,000,000 |  |  |  |  |  | 200 |  | 25 |  |  | n/a |  | n/a |  | 5.625 | %
Series D (4) |  | November 18, 2025 |  | December 15, 2030 |  | 494 |  | 0.01 |  |  | 5,000 |  |  |  |  |  | 500 |  | 100,000 |  |  | 500,000 (1/100 th) |  | 1,000 |  |  | 7.000 | %
Total |  |  |  |  |  | $ | 1,375 |  |  |  |  | 8,675,000 |  |  |  |  |  | $ | 1,370 |  |  |  |  |  |  |  |  |
(1) The book value is net of direct issuance costs and premiums or discounts. (2) Each depositary share represents a fractional ownership interest in a share of non-cumulative perpetual preferred stock. (3) Upon conversion to SOFR in 2023, BancShares began paying a credit spread adjustment in addition to the stated dividend. (4) The dividend rate is 7.000% per annum from the original issuance date to, but excluding, the first reset date of December 15, 2030. Thereafter, the dividend rate resets to the five-year treasury rate plus 3.301% on the fifth anniversary of the preceding reset date.

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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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