XML 66 R53.htm IDEA: XBRL DOCUMENT v3.21.1
Segment Information (Revenue by Segment) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Segment Reporting Information [Line Items]    
Total net premiums earned $ 724,960 $ 651,703
Miscellaneous income 4,112 1,825
Net investment income 69,716 55,967
Net realized and unrealized investment gains (losses) 5,119 (44,666)
Total Investments revenue 74,835 11,301
Total revenues 803,907 664,829
Standard Commercial Lines    
Segment Reporting Information [Line Items]    
Miscellaneous income 3,707 1,391
Total revenues 592,848 517,971
Standard Commercial Lines | Commercial Property [Member]    
Segment Reporting Information [Line Items]    
Total net premiums earned 102,810 93,869
Standard Commercial Lines | Workers Compensation [Member]    
Segment Reporting Information [Line Items]    
Total net premiums earned 78,190 66,706
Standard Commercial Lines | General Liability [Member]    
Segment Reporting Information [Line Items]    
Total net premiums earned 193,520 164,580
Standard Commercial Lines | Commercial Automobile [Member]    
Segment Reporting Information [Line Items]    
Total net premiums earned 171,881 149,690
Standard Commercial Lines | Business Owners Policies [Member]    
Segment Reporting Information [Line Items]    
Total net premiums earned 28,627 27,036
Standard Commercial Lines | Bonds Segment [Member]    
Segment Reporting Information [Line Items]    
Total net premiums earned 8,593 9,639
Standard Commercial Lines | Other Commercial [Member]    
Segment Reporting Information [Line Items]    
Total net premiums earned 5,520 5,060
Standard Personal Lines    
Segment Reporting Information [Line Items]    
Miscellaneous income 405 434
Total revenues 74,226 76,562
Standard Personal Lines | Personal Automobile [Member]    
Segment Reporting Information [Line Items]    
Total net premiums earned 41,393 42,487
Standard Personal Lines | Homeowners [Member]    
Segment Reporting Information [Line Items]    
Total net premiums earned 30,598 31,490
Standard Personal Lines | Other Personal [Member]    
Segment Reporting Information [Line Items]    
Total net premiums earned 1,830 2,151
E&S Lines    
Segment Reporting Information [Line Items]    
Total revenues 61,998 58,995
E&S Lines | Casualty Insurance Product Line [Member]    
Segment Reporting Information [Line Items]    
Total net premiums earned 43,833 44,072
E&S Lines | Property Insurance [Member]    
Segment Reporting Information [Line Items]    
Total net premiums earned $ 18,165 $ 14,923