XML 123 R105.htm IDEA: XBRL DOCUMENT v3.24.0.1
Summary Of Investments Other Than Investments In Related Parties (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]    
Cost $ 5,229,297 $ 5,019,561
Fair Value 5,228,520 4,910,800
Amounts in the Balance Sheet 5,228,520 4,910,800
Fixed maturity securities    
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]    
Cost 4,394,983 4,226,790
Fair Value 4,319,336 4,088,311
Amounts in the Balance Sheet 4,319,336 4,088,311
U.S. government bonds and agencies    
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]    
Cost 174,903 159,256
Fair Value 174,450 158,607
Amounts in the Balance Sheet 174,450 158,607
Municipal securities    
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]    
Cost 2,797,971 2,794,476
Fair Value 2,777,258 2,737,183
Amounts in the Balance Sheet 2,777,258 2,737,183
Mortgage-backed securities    
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]    
Cost 201,727 184,936
Fair Value 186,887 166,260
Amounts in the Balance Sheet 186,887 166,260
Corporate securities    
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]    
Cost 626,723 607,945
Fair Value 599,630 569,553
Amounts in the Balance Sheet 599,630 569,553
Collateralized loan obligations    
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]    
Cost 486,984 332,859
Fair Value 484,947 320,252
Amounts in the Balance Sheet 484,947 320,252
Other asset-backed securities    
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]    
Cost 106,675 147,318
Fair Value 96,164 136,456
Amounts in the Balance Sheet 96,164 136,456
Equity securities    
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]    
Cost 654,939 668,843
Fair Value 730,693 699,552
Amounts in the Balance Sheet 730,693 699,552
Common stock    
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]    
Cost 497,543 463,940
Fair Value 597,888 558,169
Amounts in the Balance Sheet 597,888 558,169
Non-redeemable preferred stock    
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]    
Cost 64,860 64,686
Fair Value 51,563 51,236
Amounts in the Balance Sheet 51,563 51,236
Private equity funds measured at net asset value    
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]    
Cost 92,536 140,217
Fair Value 81,242 90,147
Amounts in the Balance Sheet 81,242 90,147
Short-term investments    
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]    
Cost 179,375 123,928
Fair Value 178,491 122,937
Amounts in the Balance Sheet $ 178,491 $ 122,937