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v3.25.1

Capital Structure - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Nov. 29, 2024 | Nov. 26, 2024 | Aug. 13, 2019 | Sep. 20, 2016 | May 02, 2013 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Additional paid in capital | [1] |  |  |  |  |  | $ 761,700 | $ 761,700 |
Aggregate Liquidation Preference Shares |  |  |  |  |  |  | 1,000,000 | 775,000 |
Preferred Stock Issuance Cost |  |  |  |  |  |  | 29,500 |  | $ 21,500
Authorized share capital |  |  |  |  |  |  | $ 977 | $ 795 |
Number of ordinary shares |  |  |  |  |  |  | 750,000,000 | 750,000,000 |
Ordinary shares, par value |  |  |  |  |  |  | $ 0.001 | $ 0.001 |
Number of preference shares |  |  |  |  |  |  | 150,000,000 | 30,000,000 |
Preference shares, par value |  |  |  |  |  |  | $ 0.0015144558 |  |
Ordinary shares, issued |  |  |  |  |  |  | 90,833,333 | 90,833,333 |
Preference shares liquidation preference, value |  |  | $ 225,000 | $ 250,000 |  |  |  |  |
5.950% Preference Shares (AHL PRC) |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Preferred Stock Issuance Cost |  |  |  |  |  | $ 4,400 |  |  |
Preference shares, par value |  |  |  |  |  |  | $ 0.0015144558 | $ 0.0015144558 |
Preference shares, issued |  |  |  |  |  | 11,000,000,000,000 | 11,000,000 | 11,000,000 |
Preference shares, rate |  | 5.95% |  |  |  | 5.95% | 5.95% | 5.95% |
Redemption price per share |  |  |  |  |  | $ 25 | $ 25 | $ 25 |
Proceeds or share issuance |  |  |  |  |  | $ 270,600 |  |  |
Preference shares liquidation preference, value |  |  |  |  |  | $ 275,000 |  |  |
5.625% Preference Shares (AHL PRD) |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Preferred Stock Issuance Cost |  |  |  |  | $ 8,700 |  |  |  |
Preference shares, par value |  |  |  |  |  |  | $ 0.0015144558 | $ 0.0015144558 |
Preference shares, issued |  |  |  |  | 10,000,000 |  | 10,000,000 | 10,000,000 |
Preference shares, rate |  |  |  |  | 5.625% |  | 5.625% | 5.625% |
Redemption price per share |  |  |  |  | $ 25 |  | $ 25 | $ 25 |
Proceeds or share issuance |  |  |  |  | $ 241,300 |  |  |  |
Preference shares liquidation preference, value |  |  |  |  | $ 250,000 |  |  |  |
5.625% Preference Shares, rep by Dep Shares (AHL PRE) |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Preferred Stock Issuance Cost |  |  |  | $ 8,400 |  |  |  |  |
Preference shares, par value |  |  |  |  |  |  | $ 0.0015144558 | $ 0.0015144558 |
Preference shares, issued |  |  |  | 10,000,000 |  |  | 10,000,000 | 10,000,000 |
Preference shares, rate |  |  |  | 5.625% |  |  | 5.625% | 5.625% |
Redemption price per share |  |  |  | $ 25 |  |  | $ 25,000 | $ 25,000 |
7.00% Preference Shares, rep by Dep Shares (AHL PRF) |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Preferred Stock Issuance Cost |  |  | $ 8,000 |  |  |  |  |  |
Preference shares, par value |  |  |  |  |  |  | $ 0.0015144558 | $ 0.0015144558 |
Preference shares, issued |  |  | 9,000,000 |  |  |  | 9,000,000 | 0 |
Preference shares, rate |  |  | 7.00% |  |  |  | 7.00% | 7.00% |
Redemption price per share |  |  | $ 25 |  |  |  | $ 25,000 | $ 25,000 |
Proceeds or share issuance |  |  | $ 217,000 |  |  |  |  |  |
Additional paid-in capital | Preference shares |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Proceeds or share issuance |  |  |  | $ 241,600 |  |  |  |  |
[1] | The results of the March 30, 2025 Ordinary Shares Exchange have been applied retroactively for all periods.

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