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Revenue - Disaggregation of Revenue by Performance Obligation (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Disaggregation of revenue by performance obligation |  |  |  |
Revenue | $ 1,066,739 | $ 999,886 | $ 3,116,235 | $ 2,871,025
Management fee revenue - policy issuance and renewal services |  |  |  |
Disaggregation of revenue by performance obligation |  |  |  |
Revenue | 825,275 | 769,162 | 2,404,177 | 2,195,734
Management fee revenue - policy issuance and renewal services | Transferred at Point in Time |  |  |  |
Disaggregation of revenue by performance obligation |  |  |  |
Revenue | 825,275 | 769,162 | 2,404,177 | 2,195,734
Total revenue from administrative services | Transferred Over Time |  |  |  |
Disaggregation of revenue by performance obligation |  |  |  |
Revenue | 234,525 | 223,908 | 693,383 | 655,488
Management fee revenue - administrative services |  |  |  |
Disaggregation of revenue by performance obligation |  |  |  |
Revenue | 18,831 | 17,154 | 54,772 | 51,139
Management fee revenue - administrative services | Transferred Over Time |  |  |  |
Disaggregation of revenue by performance obligation |  |  |  |
Revenue | 18,831 | 17,154 | 54,772 | 51,139
Administrative services reimbursement revenue |  |  |  |
Disaggregation of revenue by performance obligation |  |  |  |
Revenue | 215,694 | 206,754 | 638,611 | 604,349
Administrative services reimbursement revenue | Transferred Over Time |  |  |  |
Disaggregation of revenue by performance obligation |  |  |  |
Revenue | $ 215,694 | $ 206,754 | $ 638,611 | $ 604,349

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