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Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
May 13, 2025 | May 09, 2025 | Dec. 31, 2025 | Dec. 31, 2024 | May 08, 2025 | May 07, 2025
Stockholders' Equity Note [Abstract] |  |  |  |  |  |  |  |  |
Common stock, shares issued (in shares) |  | 417,470 |  | 19,579,009 | [1] | 12,904,495 | [1] | 12,904,495 | 12,904,495
Common stock, shares authorized (in shares) | [1] |  |  | 100,000,000 |  | 100,000,000 |  |  |
Common stock, shares outstanding (in shares) | [1] |  |  | 19,579,009 |  | 12,904,495 |  |  |
Preferred stock, shares authorized (in shares) |  |  |  | 10,000,000 |  |  |  |  |
Preferred stock, par or stated value per share (in dollars per share) |  |  |  | $ 0.001 |  |  |  |  |
Preferred stock, shares issued (in shares) |  |  |  | 0 |  |  |  |  |
Preferred stock, shares outstanding (in shares) |  |  |  | 0 |  |  |  |  |
Issuance of common stock in connection with initial public offering, net of underwriting discounts and commissions and other offering costs (in shares) |  |  | 6,250,000 |  |  |  |  |  |
Price per share (in dollars per share) |  |  | $ 16.00 |  |  |  |  |  |
Proceeds from initial public offering, net of underwriting discounts and commissions |  |  | $ 93,000 | $ 93,000 |  | $ 0 |  |  |
Offering expenses |  |  | $ 4,200 |  |  |  |  |  |
Amount paid for tax withheld on vesting of restricted stock |  | $ 3,800 |  |  |  |  |  |  |
Termination expenses |  | $ 3,000 |  |  |  |  |  |  |
Distributions to members |  |  |  | 12,900 |  | 8,000 |  |  |
Cash distributions paid |  |  |  | $ 10,000 |  | $ 4,000 |  |  |
[1] | Both the number of shares outstanding and their par value have been retrospectively recast for all prior periods presented to reflect the par value of the outstanding stock of American Integrity Insurance Group, Inc. as a result of the Corporate Contribution. See Note 1 — “Nature of Operations and Basis of Presentation” and Note 15 — “Earnings Per Share.”

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