Reinsurance - Schedule of Reinsurance Impacts on Net Premiums Written and Earned (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Ceded Credit Risk [Line Items] | |||||||||||||||||||
| Direct premiums written | $ 490,153 | $ 255,014 | $ 831,474 | [1] | $ 507,518 | ||||||||||||||
| Assumed premiums written | 275,428 | 355,836 | [1] | ||||||||||||||||
| Ceded premiums written | (150,846) | (23,419) | [2] | (190,827) | [1],[2] | (45,673) | [2] | ||||||||||||
| Total net premiums written | 614,735 | 231,595 | 996,483 | [1] | 461,845 | ||||||||||||||
| Direct premiums earned | 415,598 | 262,044 | 793,487 | [1] | 523,955 | ||||||||||||||
| Assumed premiums earned | 190,077 | 284,575 | [1] | ||||||||||||||||
| Ceded premiums earned | [2] | (101,963) | (28,518) | (171,822) | [1] | (56,385) | |||||||||||||
| Total net premiums earned | 503,712 | 233,526 | 906,240 | [1],[3] | 467,570 | ||||||||||||||
| Ceding commissions earned | 15,291 | 7,371 | 28,244 | [4] | 14,406 | ||||||||||||||
| Ceded losses | 51,358 | 3,968 | 66,733 | [4] | 8,227 | ||||||||||||||
| Mortgage | |||||||||||||||||||
| Ceded Credit Risk [Line Items] | |||||||||||||||||||
| Direct premiums written | 261,102 | 255,014 | 520,879 | [1] | 507,518 | ||||||||||||||
| Ceded premiums written | [2] | (28,547) | (23,419) | (55,059) | [1] | (45,673) | |||||||||||||
| Total net premiums written | 232,555 | 231,595 | 465,820 | [1] | 461,845 | ||||||||||||||
| Direct premiums earned | 269,537 | 262,044 | 538,439 | [1] | 523,955 | ||||||||||||||
| Ceded premiums earned | [2] | (33,188) | (28,518) | (63,913) | [1] | (56,385) | |||||||||||||
| Total net premiums earned | 236,349 | 233,526 | 474,526 | [1] | 467,570 | ||||||||||||||
| Ceding commissions earned | [5] | 8,741 | 7,371 | 17,102 | [4] | 14,406 | |||||||||||||
| Ceded losses | 7,045 | $ 3,968 | 13,119 | [4] | $ 8,227 | ||||||||||||||
| Specialty | |||||||||||||||||||
| Ceded Credit Risk [Line Items] | |||||||||||||||||||
| Direct premiums written | 229,051 | 310,595 | [1] | ||||||||||||||||
| Assumed premiums written | 275,428 | 355,836 | [1] | ||||||||||||||||
| Ceded premiums written | (122,299) | (135,768) | [1] | ||||||||||||||||
| Total net premiums written | 382,180 | 530,663 | [1] | ||||||||||||||||
| Direct premiums earned | 146,061 | 255,048 | [1] | ||||||||||||||||
| Assumed premiums earned | 190,077 | 284,575 | [1] | ||||||||||||||||
| Ceded premiums earned | (68,775) | (107,909) | [1] | ||||||||||||||||
| Total net premiums earned | 267,363 | 431,714 | [1] | ||||||||||||||||
| Ceding commissions earned | [6] | 6,550 | 11,142 | [4] | |||||||||||||||
| Ceded losses | $ 44,313 | $ 53,614 | [4] | ||||||||||||||||
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