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Reinsurance (Tables)
9 Months Ended
Sep. 30, 2023
Reinsurance Disclosures [Abstract]  
Reinsurance Recoverable, Credit Quality Indicator [Table Text Block]
September 30, 2023
($ in thousands)CurrentPast DueTotal Reinsurance Recoverables
Financial strength rating of rated reinsurers
A++$87,295 $20 $87,315 
A+377,078 4,876 381,954 
A116,903 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 pools6,227 210 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)CurrentPast DueTotal Reinsurance Recoverables
Financial strength rating of rated reinsurers
A++$46,282 $$46,283 
A+425,395 3,191 428,586 
A106,102 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 pools13,678 415 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,
2023202220232022
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)2023202220232022
Premiums written:    
Direct$1,214,444 1,037,612 $3,579,700 3,089,166 
Assumed9,087 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 
Assumed8,916 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 
Assumed8,182 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