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Goodwill and Intangible Assets - Summary of intangible assets by major class (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Schedule of Goodwill And Intangible Assets [Line Items] |  |  |
Gross balance | $ 1,523,775 | $ 1,515,386 |
Intangible assets with a finite life, accumulated amortization | (678,020) | (571,839) |
Goodwill and intangible assets, accumulated foreign currency translation and other adjustments | (41,466) | 1,436 |
Goodwill and intangible assets | 804,289 | 944,983 | $ 692,863
Intangible liability - unfavorable service contract |  |  |
Schedule of Goodwill And Intangible Assets [Line Items] |  |  |
Gross balance | (9,533) | (9,533) |
Intangible assets with a finite life, accumulated amortization | 9,533 | 9,435 |
Goodwill and intangible assets, accumulated foreign currency translation and other adjustments | 0 | 0 |
Goodwill and intangible assets | 0 | (98) |
Intangible assets with a finite life |  |  |
Schedule of Goodwill And Intangible Assets [Line Items] |  |  |
Intangible assets with a finite life, accumulated amortization | (678,020) |  |
Goodwill and intangible assets, accumulated foreign currency translation and other adjustments | (30,843) |  |
Intangible assets with a finite life | Acquired insurance contracts |  |  |
Schedule of Goodwill And Intangible Assets [Line Items] |  |  |
Gross balance | 451,505 | 451,505 |
Intangible assets with a finite life, accumulated amortization | (426,202) | (409,592) |
Goodwill and intangible assets, accumulated foreign currency translation and other adjustments | 339 | 339 |
Goodwill and intangible assets | 25,642 | 42,252 |
Intangible assets with a finite life | Operating platform |  |  |
Schedule of Goodwill And Intangible Assets [Line Items] |  |  |
Gross balance | 52,674 | 52,674 |
Intangible assets with a finite life, accumulated amortization | (50,302) | (48,838) |
Goodwill and intangible assets, accumulated foreign currency translation and other adjustments | 2 | 56 |
Goodwill and intangible assets | 2,374 | 3,892 |
Intangible assets with a finite life | Distribution relationships |  |  |
Schedule of Goodwill And Intangible Assets [Line Items] |  |  |
Gross balance | 602,518 | 602,518 |
Intangible assets with a finite life, accumulated amortization | (207,908) | (120,302) |
Goodwill and intangible assets, accumulated foreign currency translation and other adjustments | (31,110) | (2,207) |
Goodwill and intangible assets | 363,500 | 480,009 |
Intangible assets with a finite life | Other |  |  |
Schedule of Goodwill And Intangible Assets [Line Items] |  |  |
Gross balance | 5,134 | 5,134 |
Intangible assets with a finite life, accumulated amortization | (3,141) | (2,542) |
Goodwill and intangible assets, accumulated foreign currency translation and other adjustments | (74) | 114 |
Goodwill and intangible assets | 1,919 | 2,706 |
Goodwill |  |  |
Schedule of Goodwill And Intangible Assets [Line Items] |  |  |
Gross balance | 351,231 | 342,842 |
Goodwill and intangible assets, accumulated foreign currency translation and other adjustments | (9,158) | 2,023 |
Goodwill and intangible assets | 342,073 | 344,865 |
Intangible assets with an indefinite life |  |  |
Schedule of Goodwill And Intangible Assets [Line Items] |  |  |
Goodwill and intangible assets, accumulated foreign currency translation and other adjustments | (1,465) |  |
Intangible assets with an indefinite life | Insurance licenses |  |  |
Schedule of Goodwill And Intangible Assets [Line Items] |  |  |
Gross balance | 48,331 | 48,331 |
Goodwill and intangible assets, accumulated foreign currency translation and other adjustments | 0 | 0 |
Goodwill and intangible assets | 48,331 | 48,331 |
Intangible assets with an indefinite life | Syndicate capacity |  |  |
Schedule of Goodwill And Intangible Assets [Line Items] |  |  |
Gross balance | 21,915 | 21,915 |
Goodwill and intangible assets, accumulated foreign currency translation and other adjustments | (1,465) | 1,111 |
Goodwill and intangible assets | $ 20,450 | $ 23,026 |

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