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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jan. 01, 2021 | Jan. 01, 2020 | Jun. 01, 2019 | Feb. 04, 2021 | Jan. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019
DaVinci Reinsurance Ltd. |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  | 21.40% | 21.90% |  |  | 21.40% | 21.40% | 21.90%
Common shares |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Share repurchase program, shares repurchased (in shares) |  |  |  |  |  |  | 405,682 |
Repurchase of shares |  |  |  |  |  |  | $ 62,600 |
Share repurchase program, price per share (in dollars per share) |  |  |  |  |  |  | $ 154.36 |
DaVinci Reinsurance Ltd. |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Noncontrolling interest, increase from sale of parent equity interest |  | $ 10,000 | $ 11,600 |  |  |  |  |
Subsequent Event | DaVinciRe Holdings Ltd. |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent | 28.70% |  |  |  |  |  |  |
Subsequent Event | Common shares |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Share repurchase program, shares repurchased (in shares) |  |  |  | 250,169 |  |  |  |
Repurchase of shares |  |  |  | $ 38,700 |  |  |  |
Share repurchase program, price per share (in dollars per share) |  |  |  | $ 154.75 |  |  |  |
Subsequent Event | Third-Party Investors |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Redemption of shares from redeemable noncontrolling interests | $ 156,700 |  |  |  |  |  |  |
Subsequent Event | DaVinciRe Holdings Ltd. |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Noncontrolling interest, increase from sale of parent equity interest | 40,000 |  |  |  |  |  |  |
DaVinciRe Holdings Ltd. |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Noncontrolling interest, value subscribed |  |  | 349,200 |  |  |  | $ 9,991 | $ 274,699
Redemption of shares from redeemable noncontrolling interests |  |  |  |  |  |  | (1,450) | 1,148
DaVinciRe Holdings Ltd. | Third-Party Investors |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Noncontrolling interest, value subscribed |  |  | 263,100 |  |  |  |  |
DaVinciRe Holdings Ltd. | RenaissanceRe Holdings Ltd. |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Noncontrolling interest, value subscribed |  |  | $ 86,100 |  |  |  |  |
DaVinciRe Holdings Ltd. | Subsequent Event |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Noncontrolling interest, value subscribed | 250,000 |  |  |  |  |  |  |
DaVinciRe Holdings Ltd. | Subsequent Event | Third-Party Investors |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Noncontrolling interest, value subscribed | 150,900 |  |  |  |  |  |  |
DaVinciRe Holdings Ltd. | Subsequent Event | RenaissanceRe Holdings Ltd. |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Noncontrolling interest, value subscribed | $ 99,100 |  |  |  |  |  |  |
Upsilon RFO Re Ltd. | RenaissanceRe Holdings Ltd. | Primary Beneficiary |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Payments of capital distributions |  |  |  |  |  |  | $ 102,900 | $ 31,000
Variable interest entity, ownership percentage |  |  |  |  |  |  | 13.80% | 16.50%
Upsilon RFO Re Ltd. | RenaissanceRe Holdings Ltd. | Primary Beneficiary | Preference shares |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Investment in variable interest entity |  |  |  |  |  |  | $ 98,100 | $ 100,000
Upsilon RFO Re Ltd. | Investor | Primary Beneficiary |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Payments of capital distributions |  |  |  |  |  |  | 586,000 | 279,200
Upsilon RFO Re Ltd. | Investor | Primary Beneficiary | Preference shares |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Investment in variable interest entity |  |  |  |  |  | $ 620,300 | 835,900 | $ 618,700
Upsilon RFO Re Ltd. | Investor | Primary Beneficiary | Preference shares | Other liabilities |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Investment in variable interest entity |  |  |  |  |  |  | $ 550,000 |
Upsilon RFO Re Ltd. | Subsequent Event | RenaissanceRe Holdings Ltd. | Primary Beneficiary |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Variable interest entity, ownership percentage | 12.40% |  |  |  |  |  |  |
Upsilon RFO Re Ltd. | Subsequent Event | RenaissanceRe Holdings Ltd. | Primary Beneficiary | Preference shares |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Investment in variable interest entity | $ 32,300 |  |  |  |  |  |  |
Upsilon RFO Re Ltd. | Subsequent Event | Investor | Primary Beneficiary |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Payments of capital distributions |  |  |  |  | $ 150,000 |  |  |
Upsilon RFO Re Ltd. | Subsequent Event | Investor | Primary Beneficiary | Preference shares |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Investment in variable interest entity | $ 470,300 |  |  |  |  |  |  |

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