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Business and Basis of Presentation Noncontrolling Interests (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Background And Basis Of Presentation [Line Items] |  |  |  |  |
Foreign Exchange | $ 9,973 | $ 0 | $ 13,770 | $ 0 |
Stockholders' Equity Attributable to Noncontrolling Interest | 168,522 |  | 168,522 |  | $ 197,755
Reclassification from nonredeemable noncontrolling interest including remeasurement at fair value | 42,180 |  |  |  |
Reclassification to nonredeemable noncontrolling interest | (5,136) |  |  |  |
Put / call option exercise |  |  | (1,815) |  |
Change in Nonredeemable NCI Resulting From Purchase of Shares From Minority Interest Owners |  |  | 14,362 |  |
Insurance Distribution |  |  |  |  |
Background And Basis Of Presentation [Line Items] |  |  |  |  |
Stockholders' Equity Attributable to Noncontrolling Interest | $ 117,604 |  | $ 117,604 |  | $ 146,837
Ambac Assurance Corporation [Member] |  |  |  |  |
Background And Basis Of Presentation [Line Items] |  |  |  |  |
Preferred Stock, Shares Outstanding | 4,596 |  | 4,596 |  | 4,596
Preferred Stock, Liquidation Preference, Value | $ 114,900 |  | $ 114,900 |  | $ 114,900
Stockholders' Equity Attributable to Noncontrolling Interest | $ 50,918 |  | $ 50,918 |  |

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