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Basis of Presentation and Significant Accounting Policies Noncontrolling Interest (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Stockholders' Equity Attributable to Noncontrolling Interest | $ 197,755 | $ 52,958 |
Preferred stock, shares outstanding (in shares) | 0 | 0 |
Dividend Rate on Auction Rate Preferred Shares | 11.448% |  |
Redeemable Noncontrolling Interest, Equity, Carrying Amount | $ 140,860 | $ 17,079 | $ 19,983
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value | 185,469 | 2,450 |
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest | (1,282) | 1,318 |
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders | (2,391) | (1,880) |
Temporary Equity, Accretion to Redemption Value, Adjustment | (53,210) | $ (4,792) |
Foreign exchange | (4,805) |  |
Insurance Distribution |  |  |
Stockholders' Equity Attributable to Noncontrolling Interest | $ 146,837 |  |
Riverton |  |  |
Ownership percentage | 80.00% |  |
Beat |  |  |
Ownership percentage | 60.00% |  |
Ambac Assurance Corporation |  |  |
Stockholders' Equity Attributable to Noncontrolling Interest | $ 50,918 |  |
Preferred stock, shares outstanding (in shares) | 4,596 | 4,596 |
Preferred stock, liquidation preference, value | $ 114,900 | $ 114,900 |
Beat | Minimum [Member] | Beat |  |  |
Ownership percentage | 60.00% |  |
Subsidiary, Ownership Percentage, Parent | 36.00% |  |
Beat | Maximum [Member] | Beat |  |  |
Ownership percentage | 100.00% |  |
Subsidiary, Ownership Percentage, Parent | 60.00% |  |

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