XML 57 R23.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Reinsurance (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2015
Reinsurance Disclosures [Abstract] |
Schedule of List Of Direct, Assumed, And Ceded Reinsurance Amounts |
|  | Quarter ended June 30, |  | Six Months ended June 30,
($ in thousands) |  | 2015 |  | 2014 |  | 2015 |  | 2014
Premiums written: |  |  |  |  |  |  |  |  |  |  |  |
Direct |  | $ | 621,408 |  |  | 572,314 |  |  | 1,220,191 |  |  | 1,130,205 |
Assumed |  | 4,960 |  |  | 5,837 |  |  | 11,041 |  |  | 13,687 |
Ceded |  | (94,235 | ) |  | (98,328 | ) |  | (181,011 | ) |  | (187,319 | )
Net |  | $ | 532,133 |  |  | 479,823 |  |  | 1,050,221 |  |  | 956,573 |
Premiums earned: |  |  |  |  |  |  |  |  |  |  |  |
Direct |  | $ | 576,107 |  |  | 544,913 |  |  | 1,138,149 |  |  | 1,081,613 |
Assumed |  | 5,093 |  |  | 10,385 |  |  | 11,001 |  |  | 20,570 |
Ceded |  | (90,891 | ) |  | (91,673 | ) |  | (182,718 | ) |  | (182,063 | )
Net |  | $ | 490,309 |  |  | 463,625 |  |  | 966,432 |  |  | 920,120 |
Loss and loss expense incurred: |  |  |  |  |  |  |  |  |  |  |  |
Direct |  | $ | 316,648 |  |  | 332,707 |  |  | 628,894 |  |  | 691,056 |
Assumed |  | 4,228 |  |  | 7,377 |  |  | 8,890 |  |  | 14,856 |
Ceded |  | (29,315 | ) |  | (42,289 | ) |  | (61,224 | ) |  | (87,571 | )
Net |  | $ | 291,561 |  |  | 297,795 |  |  | 576,560 |  |  | 618,341 |
Schedule of Ceded Premiums and Losses Related to Flood Operations |
Ceded to NFIP |  | Quarter ended June 30, |  | Six Months ended June 30,
($ in thousands) |  | 2015 |  | 2014 |  | 2015 |  | 2014
Ceded premiums written |  | $ | (62,479 | ) |  | (65,775 | ) |  | (116,321 | ) |  | (123,078 | )
Ceded premiums earned |  | (58,781 | ) |  | (59,213 | ) |  | (117,779 | ) |  | (117,499 | )
Ceded loss and loss expense incurred |  | (14,684 | ) |  | (26,712 | ) |  | (20,933 | ) |  | (34,091 | )

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
- References No definition available. + Details
Name: | us-gaap_ReinsuranceDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration