XML 41 R53.htm IDEA: XBRL DOCUMENT v2.4.0.6
Segment Information (Revenue From Continuing Operations by Segment) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Segment Reporting Information [Line Items]        
Total net premiums earned $ 392,212 $ 355,580 $ 771,041 $ 706,923
Other income 2,511 2,499 6,044 5,379
Total Insurance Operating Revenues 394,650 357,968 776,936 712,081
Net investment income 34,006 39,345 66,634 82,818
Net realized gain on investments 178 2,146 4,536 7,906
Total investment income, before federal income tax 34,184 41,491 71,170 90,724
Total all segments 428,834 399,459 848,106 802,805
Total revenues 428,907 399,570 848,255 803,026
Commercial Automobile [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 71,540 69,198 142,024 138,868
Workers Compensation [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 66,661 63,855 132,472 126,381
General Liability [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 92,632 85,672 182,775 168,238
Commercial Property [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 50,377 47,877 99,748 96,070
Business Owners' Policies [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 17,266 16,407 34,123 32,892
Bonds Segment [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 4,700 4,725 9,363 9,492
Other Commercial [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 19,080 2,561 31,971 5,117
Total Commercial Lines [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 322,256 290,295 632,476 577,058
Personal Automobile [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 37,897 37,189 75,353 74,151
Homeowners [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 28,808 25,060 56,766 49,615
Other Personal [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 3,251 3,036 6,446 6,099
Total Personal Lines [Member]
        
Segment Reporting Information [Line Items]        
Total net premiums earned 69,956 65,285 138,565 129,865
Miscellaneous Income [Member]
        
Segment Reporting Information [Line Items]        
Other income 2,438 2,388 5,895 5,158
Other Income [Member]
        
Segment Reporting Information [Line Items]        
Other income $ 73 $ 111 $ 149 $ 221