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Equity - Narrative (Details) |  | 8 Months Ended | 12 Months Ended | 57 Months Ended | 58 Months Ended |  |  |  |  |  |
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Aug. 01, 2025 shares | Dec. 31, 2025 USD ($) period director $ / shares shares | Dec. 31, 2025 USD ($) period director $ / shares shares | Dec. 31, 2024 USD ($) shares | Dec. 31, 2025 USD ($) period director $ / shares shares | Dec. 31, 2025 USD ($) period director $ / shares shares | Nov. 06, 2024 USD ($) | Mar. 26, 2024 USD ($) | May 04, 2023 USD ($) | Aug. 03, 2022 USD ($) | Apr. 07, 2021 shares | Feb. 22, 2021 USD ($)
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of independent directors | director |  | 4 | 4 |  | 4 | 4 |  |  |  |  |  |
Director's fee | $ |  |  | $ 150,000 |  |  |  |  |  |  |  |  |
Directors fees paid in cash | $ |  | $ 70,000 | 70,000 |  | $ 70,000 | $ 70,000 |  |  |  |  |  |
Directors fees paid in common stock | $ |  | $ 80,000 | $ 80,000 |  | $ 80,000 | $ 80,000 |  |  |  |  |  |
Capital available for issuance | $ |  |  |  |  |  |  |  | $ 1,000,000,000.0 |  |  |  |
Effective period |  |  |  |  |  |  |  | 3 years |  |  |  |
Preferred shares authorized (in shares) |  | 50,000,000.0 | 50,000,000.0 |  | 50,000,000.0 | 50,000,000.0 |  |  |  |  |  |
Preferred stock, par value (in dollars per share) | $ / shares |  | $ 0.01 | $ 0.01 |  | $ 0.01 | $ 0.01 |  |  |  |  |  |
Preferred stock, shares outstanding (in shares) |  | 9,120,000 | 9,120,000 |  | 9,120,000 | 9,120,000 |  |  |  |  |  |
Quarterly periods required to grant preferred stock voting rights | period |  | 6 | 6 |  | 6 | 6 |  |  |  |  |  |
Number of directors | director |  |  | 2 |  |  |  |  |  |  |  |  |
Percent of votes needed to pass |  | 66.67% | 66.67% |  | 66.67% | 66.67% |  |  |  |  |  |
ARC Home | Related Party |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loan securitization, additional interest | 21.40% |  |  |  |  |  |  |  |  |  |  |
Share issued in connection with acquisition (in shares) | 2,027,676 |  |  |  |  |  |  |  |  |  |  |
8.25% Series A Cumulative Redeemable Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued (in shares) |  | 1,700,000 | 1,700,000 | 1,700,000 | 1,700,000 | 1,700,000 |  |  |  |  |  |
Preferred stock, shares outstanding (in shares) |  | 1,663,000 | 1,663,000 | 1,700,000 | 1,663,000 | 1,663,000 |  |  |  |  |  |
Series B Cumulative Reedmable Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued (in shares) |  | 3,700,000 | 3,700,000 | 3,700,000 | 3,700,000 | 3,700,000 |  |  |  |  |  |
Preferred stock, shares outstanding (in shares) |  | 3,728,000 | 3,728,000 | 3,700,000 | 3,728,000 | 3,728,000 |  |  |  |  |  |
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued (in shares) |  | 3,700,000 | 3,700,000 | 3,700,000 | 3,700,000 | 3,700,000 |  |  |  |  |  |
Preferred stock, shares outstanding (in shares) |  | 3,729,000 | 3,729,000 | 3,700,000 | 3,729,000 | 3,729,000 |  |  |  |  |  |
BTIG, LLC, JonesTrading Institutional Services LLC, Keefe, Bruyette & Woods, Inc. and Piper Sandler & Co. |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount authorized | $ |  |  |  |  |  |  | $ 75,000,000.0 |  |  |  |  |
Issuance of common stock (in shares) |  |  | 0 | 0 |  |  |  |  |  |  |  |
Independent Director |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Dividend equivalent units vested (in shares) |  | 2,919,000 | 2,919,000 |  | 2,919,000 | 2,919,000 |  |  |  |  |  |
Non-Executive Chair |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Director's fee | $ |  |  | $ 60,000 |  |  |  |  |  |  |  |  |
Directors fees paid in cash | $ |  | $ 30,000 | 30,000 |  | $ 30,000 | $ 30,000 |  |  |  |  |  |
Directors fees paid in common stock | $ |  | $ 30,000 | 30,000 |  | $ 30,000 | $ 30,000 |  |  |  |  |  |
Audit Committee Chairman |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Additional annual fees | $ |  |  | 25,000 |  |  |  |  |  |  |  |  |
Compensation And Nomination Committee Chairman |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Additional annual fees | $ |  |  | 10,000 |  |  |  |  |  |  |  |  |
Corporate Governance Committee Chairman |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Additional annual fees | $ |  |  | $ 10,000 |  |  |  |  |  |  |  |  |
Restricted Stock | Independent Director |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Outstanding shares vested (in shares) |  | 12,981,000 | 12,981,000 |  | 12,981,000 | 12,981,000 |  |  |  |  |  |
Restricted stock unit conversion ratio |  |  | 1 |  |  |  |  |  |  |  |  |
Restricted Stock and Restricted Stock Units |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Shares of restricted common stock under equity incentive plans (in shares) |  |  | 64,500 | 205,224 |  |  |  |  |  |  |  |
Capitalized equity based compensation expense | $ |  |  | $ 700,000 | $ 700,000 |  |  |  |  |  |  |  |
2025 Equity Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of shares authorized (in shares) |  | 800,000 | 800,000 |  | 800,000 | 800,000 |  |  |  |  |  |
Number of dividend equivalent units granted (in shares) |  | 870 |  |  |  |  |  |  |  |  |  |
Shares available to be awarded under equity incentive plans (in shares) |  | 994,510 | 994,510 |  | 994,510 | 994,510 |  |  |  |  |  |
2025 Equity Incentive Plan | Restricted Stock |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Shares of restricted common stock under equity incentive plans (in shares) |  | 25,401 |  |  |  |  |  |  |  |  |  |
2020 Equity Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of shares authorized (in shares) |  | 220,781 | 220,781 |  | 220,781 | 220,781 |  |  |  |  |  |
Number of shares subject to issuance if forfeited or lapse (in shares) |  | 130,000 | 130,000 |  | 130,000 | 130,000 |  |  |  |  |  |
2021 Equity Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of shares authorized (in shares) |  |  |  |  |  |  |  |  |  |  | 573,425 |
Shares of restricted common stock under equity incentive plans (in shares) |  |  |  |  | 0 |  |  |  |  |  |  |
2022 Repurchase Program |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Authorized amount for stock repurchase | $ |  |  |  |  |  |  |  |  |  | $ 15,000,000.0 |  |
Value of common stock remained authorized for future share repurchases | $ |  | $ 1,500,000 | $ 1,500,000 |  | $ 1,500,000 | $ 1,500,000 |  |  |  |  |  |
Shares repurchased (in shares) |  |  | 0 | 0 |  |  |  |  |  |  |  |
2023 Repurchase Program |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Authorized amount for stock repurchase | $ |  |  |  |  |  |  |  |  | $ 15,000,000.0 |  |  |
Value of common stock remained authorized for future share repurchases | $ |  | $ 15,000,000.0 | $ 15,000,000.0 |  | $ 15,000,000.0 | $ 15,000,000.0 |  |  |  |  |  |
Preferred Repurchase Program |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Authorized amount for stock repurchase | $ |  |  |  |  |  |  |  |  |  |  |  | $ 20,000,000.0
Shares repurchased (in shares) |  |  |  |  |  | 0 |  |  |  |  |  |

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