XML 78 R66.htm IDEA: XBRL DOCUMENT v3.25.1
Segment Information - Schedule of Revenue by Segment (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Revenue from External Customer [Line Items]    
Net premiums earned $ 1,158,757 $ 1,050,944
Miscellaneous income 5,509 7,801
Net investment income earned 120,691 107,849
Net realized and unrealized investment gains (losses) 229 (1,635)
Total Investments revenue 120,920 106,214
Total revenues 1,285,186 1,164,959
Standard Commercial Lines    
Revenue from External Customer [Line Items]    
Net premiums earned 912,210 834,110
Total revenues 917,070 841,244
Standard Personal Lines    
Revenue from External Customer [Line Items]    
Net premiums earned 103,655 103,846
Total revenues 104,227 104,486
E&S Lines    
Revenue from External Customer [Line Items]    
Net premiums earned 142,892 112,988
Total revenues 142,969 113,015
General liability | Standard Commercial Lines    
Revenue from External Customer [Line Items]    
Net premiums earned 294,687 273,415
Commercial automobile | Standard Commercial Lines    
Revenue from External Customer [Line Items]    
Net premiums earned 283,585 251,720
Commercial property | Standard Commercial Lines    
Revenue from External Customer [Line Items]    
Net premiums earned 186,530 161,553
Workers compensation | Standard Commercial Lines    
Revenue from External Customer [Line Items]    
Net premiums earned 79,036 87,777
Businessowners' policies | Standard Commercial Lines    
Revenue from External Customer [Line Items]    
Net premiums earned 46,893 39,921
Bonds | Standard Commercial Lines    
Revenue from External Customer [Line Items]    
Net premiums earned 13,258 12,088
Other | Standard Commercial Lines    
Revenue from External Customer [Line Items]    
Net premiums earned 8,221 7,636
Miscellaneous income | Standard Commercial Lines    
Revenue from External Customer [Line Items]    
Miscellaneous income 4,860 7,134
Miscellaneous income | Standard Personal Lines    
Revenue from External Customer [Line Items]    
Miscellaneous income 572 640
Miscellaneous income | E&S Lines    
Revenue from External Customer [Line Items]    
Miscellaneous income 77 27
Personal automobile | Standard Personal Lines    
Revenue from External Customer [Line Items]    
Net premiums earned 52,968 56,960
Homeowners | Standard Personal Lines    
Revenue from External Customer [Line Items]    
Net premiums earned 47,943 44,113
Other | Standard Personal Lines    
Revenue from External Customer [Line Items]    
Net premiums earned 2,744 2,773
Casualty lines | E&S Lines    
Revenue from External Customer [Line Items]    
Net premiums earned 85,119 71,638
Property lines | E&S Lines    
Revenue from External Customer [Line Items]    
Net premiums earned $ 57,773 $ 41,350