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v3.25.1

Financial Guarantee Insurance Contracts - Summary of Gross Premium Receivable Roll-Forward (Direct and Assumed Contracts) (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2023
Insurance [Line Items] |  |  |  |
Allowance for Doubtful Accounts, Premiums and Other Receivables | $ 142 | $ 0 | $ 142 | $ 0
Past Due Premiums Receivable | 0 |  | 0 |
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward] |  |  |  |
Premium Receivable, Allowance for Credit Loss | 142 |  | 142 |
Premium Receivable, Credit Loss Expense (Reversal) | 0 | 0 |  |
Premium Receivable, Allowance for Credit Loss, Writeoff | 0 | 0 |  |
Premium Receivable, Allowance for Credit Loss, Recovery | 0 | 0 |  |
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 |  | 0 |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | 1,026,048 | $ 1,418,165 | 1,054,661 | $ 1,414,615
Premiums Receivable, Net | 64,563 |  | 57,222 |
Past Due Premiums | 6,357 |  | 5,690 |
Fair Value, Recurring [Member] | Loans Receivable [Member] |  |  |  |
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward] |  |  |  |
Loans | 3,406 |  | 3,434 |
Reported Value Measurement [Member] |  |  |  |
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward] |  |  |  |
Loans | $ 3,406 |  | $ 3,434 |

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