XML 48 R24.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Reinsurance (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2014
Reinsurance Disclosures [Abstract] |
Schedule of List Of Direct, Assumed, And Ceded Reinsurance Amounts |
|  | Quarter ended June 30, | Six Months ended June 30,
($ in thousands) |  | 2014 |  | 2013 | 2014 |  | 2013
Premiums written: |  |  |  |  |  |  |  |  |  |  |
Direct |  | $ | 572,314 |  |  | 551,190 |  | 1,130,205 |  |  | 1,080,006 |
Assumed |  | 5,837 |  |  | 4,378 |  | 13,687 |  |  | 12,860 |
Ceded |  | (98,328 | ) |  | (93,391 | ) | (187,319 | ) |  | (180,565 | )
Net |  | $ | 479,823 |  |  | 462,177 |  | 956,573 |  |  | 912,301 |
Premiums earned: |  |  |  |  |  |  |  |  |  |  |
Direct |  | $ | 544,913 |  |  | 504,081 |  | 1,081,613 |  |  | 998,147 |
Assumed |  | 10,385 |  |  | 8,951 |  | 20,570 |  |  | 21,414 |
Ceded |  | (91,673 | ) |  | (86,780 | ) | (182,063 | ) |  | (172,369 | )
Net |  | $ | 463,625 |  |  | 426,252 |  | 920,120 |  |  | 847,192 |
Loss and loss expense incurred: |  |  |  |  |  |  |  |  |  |  |
Direct |  | $ | 332,707 |  |  | 338,954 |  | 691,056 |  |  | 704,600 |
Assumed |  | 7,377 |  |  | 6,420 |  | 14,856 |  |  | 15,494 |
Ceded |  | (42,289 | ) |  | (65,780 | ) | (87,571 | ) |  | (170,651 | )
Net |  | $ | 297,795 |  |  | 279,594 |  | 618,341 |  |  | 549,443 |
Schedule of Ceded Premiums and Losses Related to Flood Operations |
Ceded to NFIP |  | Quarter ended June 30, |  | Six Months ended June 30,
($ in thousands) |  | 2014 |  | 2013 |  | 2014 |  | 2013
Ceded premiums written |  | $ | (65,775 | ) |  | (62,461 | ) |  | (123,078 | ) |  | (119,168 | )
Ceded premiums earned |  | (59,213 | ) |  | (56,450 | ) |  | (117,499 | ) |  | (111,777 | )
Ceded loss and loss expense incurred |  | (26,712 | ) |  | (51,725 | ) |  | (34,091 | ) |  | (127,901 | )

X
- Definition This table discloses the premiums and losses and loss expenses that are ceded to the National Flood Insurance Program. + References No definition available. + Details
Name: | sigi_ScheduleOfFloodCededPremiumsAndLossesTableTextBlock
Namespace Prefix: | sigi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the effects of reinsurance, for example, but not limited to, disclosure of direct, assumed, and ceded insurance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 + Details
Name: | us-gaap_EffectsOfReinsuranceTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ReinsuranceDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration