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Schedule - Supplementary Insurance Information | 12 Months Ended
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Dec. 31, 2011
Disclosure - Schedule - Supplementary Insurance Information [Abstract] |
Schedule - Supplementary Insurance Information | SCHEDULE IV SELECTIVE INSURANCE GROUP, INC. AND CONSOLIDATED SUBSIDIARIES SUPPLEMENTARY INSURANCE INFORMATION Year ended December 31, 2011
|  |  |  |  |  |  |  | Amortization |  |
|  | Deferred | Reserve |  |  |  | Losses | of deferred |  |
|  | policy | for losses |  | Net | Net | and loss | policy | Other | Net
|  | acquisition | and loss | Unearned | premiums | investment | expenses | acquisition | operating | premiums
($ in thousands) |  | costs | expenses | premiums | earned | income1 | incurred | costs2 | expenses2 | written
Insurance Operations Segment | $ | 214,069 | 3,144,924 | 906,991 | 1,439,313 | - | 1,074,987 | 430,786 | 40,458 | 1,485,349
Investments Segment |  | - | - | - | - | 149,683 | - | - | - | -
Total | $ | 214,069 | 3,144,924 | 906,991 | 1,439,313 | 149,683 | 1,074,987 | 430,786 | 40,458 | 1,485,349
1 | Includes "Net investment income earned" and "Net realized investment gains" on the Consolidated Statements of Income.
2 | The total of "Amortization of deferred policy acquisition costs" of $430,786 and "Other operating expenses" of $40,458 reconciles to the Consolidated Statements of Income as follows:
Policy acquisition costs | $ | 469,739
Other income3 |  | (8,069)
Other expenses3 |  | 9,574
Total | $ | 471,244
3 | In addition to amounts related to the Insurance Operations segment, "Other income" and "Other expenses" on the Consolidated Statements of Income includes holding company income and expense amounts of $410 and $16,850, respectively.
Year ended December 31, 2010
|  |  |  |  |  |  |  | Amortization |  |
|  | Deferred | Reserve |  |  |  | Losses | of deferred |  |
|  | policy | for losses |  | Net | Net | and loss | policy | Other | Net
|  | acquisition | and loss | Unearned | premiums | investment | expenses | acquisition | operating | premiums
($ in thousands) |  | costs | expenses | premiums | earned | income1 | incurred | costs2 | expenses2 | written
Insurance Operations Segment | $ | 209,627 | 2,830,058 | 823,596 | 1,416,598 | - | 982,118 | 429,524 | 27,123 | 1,390,541
Investments Segment |  | - | - | - | - | 138,625 | - | - | - | -
Total | $ | 209,627 | 2,830,058 | 823,596 | 1,416,598 | 138,625 | 982,118 | 429,524 | 27,123 | 1,390,541
1 | Includes "Net investment income earned" and "Net realized investment gains" on the Consolidated Statements of Income.
2 | The total of "Amortization of deferred policy acquisition costs" of $429,524 and "Other operating expenses" of $27,123 reconciles to the Consolidated Statements of Income as follows:
Policy acquisition costs | $ | 458,045
Other income3 |  | (9,230)
Other expenses3 |  | 7,832
Total | $ | 456,647
3 | In addition to amounts related to the Insurance Operations segment, "Other income" and "Other expenses" on the Consolidated Statements of Income includes holding company income and expense amounts of $168 and $16,054, respectively.
Year ended December 31, 2009
|  |  |  |  |  |  |  | Amortization |  |
|  | Deferred | Reserve |  |  |  | Losses | of deferred |  |
|  | policy | for losses |  | Net | Net | and loss | policy | Other | Net
|  | acquisition | and loss | Unearned | premiums | investment | expenses | acquisition | operating | premiums
($ in thousands) |  | costs | expenses | premiums | earned | income1 | incurred | costs2 | expenses2 | written
Insurance Operations Segment | $ | 218,601 | 2,745,799 | 844,847 | 1,431,047 | - | 971,905 | 428,554 | 28,202 | 1,422,655
Investments Segment |  | - | - | - | - | 72,501 | - | - | - | -
Total | $ | 218,601 | 2,745,799 | 844,847 | 1,431,047 | 72,501 | 971,905 | 428,554 | 28,202 | 1,422,655
1 | Includes "Net investment income earned" and "Net realized investment gains" on the Consolidated Statements of Income.
2 | The total of "Amortization of deferred policy acquisition costs" of $428,554 and "Other operating expenses" of $28,202 reconciles to the Consolidated Statements of Income as follows:
Policy acquisition costs | $ | 457,424
Other income3 |  | (10,440)
Other expenses3 |  | 9,772
Total | $ | 456,756
3 | In addition to amounts related to the Insurance Operations segment, "Other income" and "Other expenses" on the Consolidated Statements of Income includes holding company income and expense amounts of $30 and $16,345, respectively.

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- Definition The entire disclosure for required supplementary insurance information giving segment detail in support of various balance sheet and income statement captions. The balance sheet information generally is presented as of the date of each audited balance sheet filed, and the income statement information generally is presented for each period for which an audited income statement is required to be filed. Supplementary insurance information table includes segment name; deferred policy acquisition costs; future policy benefits, losses, claims and loss expenses; unearned premiums; other policy claims and benefits payable; premium revenue; net investment income; benefits, claims, losses and settlement expenses; amortization of deferred policy acquisition costs; other operating expenses; and premiums written. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.7-05.(c) Schedule III) -URI http://asc.fasb.org/extlink&oid=6879921&loc=d3e569147-122900 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 16 -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 7 -Section 05 -Paragraph c Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-16) -URI http://asc.fasb.org/extlink&oid=6588446&loc=d3e574960-122915 + Details
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