XML 60 R54.htm IDEA: XBRL DOCUMENT v2.4.0.8
Segment Information (Revenue From Continuing Operations by Segment) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Segment Reporting Information [Line Items]        
Total net premiums earned $ 437,568 $ 406,225 $ 1,284,760 $ 1,177,266
Other income 3,357 1,085 9,677 7,129
Net investment income 32,457 30,650 99,330 97,284
Net realized investment gains 13,431 (1,088) 21,940 3,448
Total investment revenues 45,888 29,562 121,270 100,732
Total all segments 486,798 436,796 1,415,620 1,284,902
Total revenues 486,813 436,872 1,415,707 1,285,127
Commercial Automobile [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 79,138 72,758 230,191 214,782
Workers Compensation [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 66,510 65,592 197,449 198,064
General Liability [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 100,925 93,763 298,394 276,538
Commercial Property [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 57,004 52,197 165,356 151,945
Business Owners' Policies [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 19,629 17,749 56,794 51,872
Bonds Segment [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 4,705 4,713 14,244 14,076
Other Commercial [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 3,051 2,921 9,036 9,202
Total standard Commercial Lines [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 330,962 309,693 971,464 916,479
Personal Automobile [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 38,513 38,295 115,432 113,648
Homeowners [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 32,374 29,919 95,211 86,685
Other Personal [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 3,827 3,591 10,655 10,037
Total standard Personal Lines [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 74,714 71,805 221,298 210,370
Total Standard Insurance Operations [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 405,676 381,498 1,192,762 1,126,849
Total insurance operations revenues 409,018 382,507 1,202,352 1,133,753
Miscellaneous Income [Member]
        
Segment Reporting Information [Line Items]        
Other income 3,342 1,009 9,590 6,904
Excess And Surplus Operations [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 31,892 24,727 91,998 50,417
Other Income [Member]
        
Segment Reporting Information [Line Items]        
Other income $ 15 $ 76 $ 87 $ 225