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Reinsurance (Tables) | 9 Months Ended
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Sep. 30, 2023
Reinsurance Disclosures [Abstract] |
Reinsurance Recoverable, Credit Quality Indicator [Table Text Block] |
|  | September 30, 2023
($ in thousands) |  | Current |  | Past Due |  | Total Reinsurance Recoverables
Financial strength rating of rated reinsurers |  |  |  |  |  |
A++ |  | $ | 87,295 |  |  | $ | 20 |  |  | $ | 87,315 |
A+ |  | 377,078 |  |  | 4,876 |  |  | 381,954 |
A |  | 116,903 |  |  | 1,981 |  |  | 118,884 |
A- |  | 3,669 |  |  | 89 |  |  | 3,758 |
Total rated reinsurers |  | $ | 584,945 |  |  | $ | 6,966 |  |  | $ | 591,911 |
Non-rated reinsurers |  |  |  |  |  |
Federal and state pools |  | $ | 88,777 |  |  | $ | 16 |  |  | $ | 88,793 |
Other than federal and state pools |  | 6,227 |  |  | 210 |  |  | 6,437 |
Total non-rated reinsurers |  | $ | 95,004 |  |  | $ | 226 |  |  | $ | 95,230 |
Total reinsurance recoverable, gross |  | $ | 679,949 |  |  | $ | 7,192 |  |  | $ | 687,141 |
Less: allowance for credit losses |  |  |  |  |  | (1,800) |
Total reinsurance recoverable, net |  |  |  |  |  | $ | 685,341 |
|  | December 31, 2022
($ in thousands) |  | Current |  | Past Due |  | Total Reinsurance Recoverables
Financial strength rating of rated reinsurers |  |  |  |  |  |
A++ |  | $ | 46,282 |  |  | $ | 1 |  |  | $ | 46,283 |
A+ |  | 425,395 |  |  | 3,191 |  |  | 428,586 |
A |  | 106,102 |  |  | 1,315 |  |  | 107,417 |
A- |  | 7,148 |  |  | 89 |  |  | 7,237 |
Total rated reinsurers |  | $ | 584,927 |  |  | $ | 4,596 |  |  | $ | 589,523 |
Non-rated reinsurers |  |  |  |  |  |
Federal and state pools |  | $ | 180,794 |  |  | $ | — |  |  | $ | 180,794 |
Other than federal and state pools |  | 13,678 |  |  | 415 |  |  | 14,093 |
Total non-rated reinsurers |  | $ | 194,472 |  |  | $ | 415 |  |  | $ | 194,887 |
Total reinsurance recoverable, gross |  | $ | 779,399 |  |  | $ | 5,011 |  |  | $ | 784,410 |
Less: allowance for credit losses |  |  |  |  |  | (1,600) |
Total reinsurance recoverable, net |  |  |  |  |  | $ | 782,810 |
Reinsurance Recoverable, Allowance for Credit Loss [Table Text Block] |
($ in thousands) |  | Quarter ended September 30, |  | Nine Months ended September 30,
|  | 2023 |  | 2022 |  | 2023 |  | 2022
Balance at beginning of period |  | $ | 1,800 |  |  | 1,600 |  |  | $ | 1,600 |  |  | 1,600 |
Current period change for expected credit losses |  | — |  |  | — |  |  | 200 |  |  | — |
Write-offs charged against the allowance for credit losses |  | — |  |  | — |  |  | — |  |  | — |
Recoveries |  | — |  |  | — |  |  | — |  |  | — |
Allowance for credit losses, end of period |  | $ | 1,800 |  |  | 1,600 |  |  | $ | 1,800 |  |  | 1,600 |
Schedule of List Of Direct, Assumed, And Ceded Reinsurance Amounts |
|  | Quarter ended September 30, |  | Nine Months ended September 30,
($ in thousands) |  | 2023 |  | 2022 |  | 2023 |  | 2022
Premiums written: |  |  |  |  |  |  |  |
Direct |  | $ | 1,214,444 |  |  | 1,037,612 |  |  | $ | 3,579,700 |  |  | 3,089,166 |
Assumed |  | 9,087 |  |  | 9,531 |  |  | 20,058 |  |  | 23,398 |
Ceded |  | (165,206) |  |  | (143,749) |  |  | (456,758) |  |  | (388,631) |
Net |  | $ | 1,058,325 |  |  | 903,394 |  |  | $ | 3,143,000 |  |  | 2,723,933 |
Premiums earned: |  |  |  |  |  |  |  |
Direct |  | $ | 1,123,444 |  |  | 984,981 |  |  | $ | 3,229,170 |  |  | 2,872,008 |
Assumed |  | 8,916 |  |  | 8,514 |  |  | 21,174 |  |  | 21,523 |
Ceded |  | (150,443) |  |  | (139,616) |  |  | (423,941) |  |  | (392,930) |
Net |  | $ | 981,917 |  |  | 853,879 |  |  | $ | 2,826,403 |  |  | 2,500,601 |
Loss and loss expense incurred: |  |  |  |  |  |  |  |
Direct |  | $ | 741,288 |  |  | 732,568 |  |  | $ | 2,053,511 |  |  | 1,821,069 |
Assumed |  | 8,182 |  |  | 6,443 |  |  | 19,115 |  |  | 15,846 |
Ceded |  | (103,573) |  |  | (191,185) |  |  | (213,161) |  |  | (269,985) |
Net |  | $ | 645,897 |  |  | 547,826 |  |  | $ | 1,859,465 |  |  | 1,566,930 |

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- Definition Tabular disclosure of allowance for credit loss on reinsurance recoverable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
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