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Schedule III - Supplementary Insurance Information | 12 Months Ended
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Dec. 31, 2017
Supplementary Insurance Information [Abstract] |
Schedule III- Supplementary Insurance Information |
($ in thousands) |  | Deferred policy acquisition costs |  | Reserve for loss and loss expense |  | Unearned premiums |  | Net premiums earned |  | Net investment income1 |  | Loss and loss expense incurred |  | Amortization of deferred policy acquisition costs |  | Other operating expenses2 |  | Net premiums written
Standard Commercial Lines Segment |  | $ | 193,408 |  |  | 3,165,217 |  |  | 956,173 |  |  | 1,788,499 |  |  | — |  |  | 1,008,150 |  |  | 387,552 |  |  | 243,283 |  |  | 1,858,735 |
Standard Personal Lines Segment |  | 16,952 |  |  | 263,166 |  |  | 295,435 |  |  | 289,701 |  |  | — |  |  | 189,294 |  |  | 32,542 |  |  | 56,761 |  |  | 296,775 |
E&S Lines Segment |  | 24,695 |  |  | 342,857 |  |  | 98,036 |  |  | 212,827 |  |  | — |  |  | 147,630 |  |  | 49,142 |  |  | 22,337 |  |  | 215,131 |
Investments Segment |  | — |  |  | — |  |  | — |  |  | — |  |  | 168,241 |  |  | — |  |  | — |  |  | — |  |  | — |
Total |  | $ | 235,055 |  |  | 3,771,240 |  |  | 1,349,644 |  |  | 2,291,027 |  |  | 168,241 |  |  | 1,345,074 |  |  | 469,236 |  |  | 322,381 |  |  | 2,370,641 |
1 Includes “Net investment income earned” and “Net realized investment gains” on the Consolidated Statements of Income. 2 “Other operating expenses” of $322,381 reconciles to the Consolidated Statements of Income as follows:
Other insurance expenses | $ | 333,097 |
Other income | (10,716 | )
Total | $ | 322,381 |
See accompanying Report of Independent Registered Public Accounting Firm in Item 8. "Financial Statements and Supplementary Data." of this Form 10-K. Year ended December 31, 2016
($ in thousands) |  | Deferred policy acquisition costs |  | Reserve for loss and loss expense |  | Unearned premiums |  | Net premiums earned |  | Net investment income1 |  | Loss and loss expense incurred |  | Amortization of deferred policy acquisition costs |  | Other operating expenses2 |  | Net premiums written
Standard Commercial Lines Segment |  | $ | 181,193 |  |  | 3,098,554 |  |  | 884,976 |  |  | 1,665,483 |  |  | — |  |  | 913,506 |  |  | 367,813 |  |  | 237,729 |  |  | 1,745,782 |
Standard Personal Lines Segment |  | 16,664 |  |  | 286,081 |  |  | 282,111 |  |  | 280,607 |  |  | — |  |  | 177,749 |  |  | 34,105 |  |  | 56,334 |  |  | 281,822 |
E&S Lines Segment |  | 24,707 |  |  | 307,084 |  |  | 95,732 |  |  | 203,482 |  |  | — |  |  | 143,542 |  |  | 48,410 |  |  | 18,451 |  |  | 209,684 |
Investments Segment |  | — |  |  | — |  |  | — |  |  | — |  |  | 125,817 |  |  | — |  |  | — |  |  | — |  |  | — |
Total |  | $ | 222,564 |  |  | 3,691,719 |  |  | 1,262,819 |  |  | 2,149,572 |  |  | 125,817 |  |  | 1,234,797 |  |  | 450,328 |  |  | 312,514 |  |  | 2,237,288 |
1 Includes “Net investment income earned” and “Net realized investment gains” on the Consolidated Statements of Income. 2 “Other operating expenses” of $312,514 reconciles to the Consolidated Statements of Income as follows:
Other insurance expenses | $ | 321,395 |
Other income | (8,881 | )
Total | $ | 312,514 |
See accompanying Report of Independent Registered Public Accounting Firm in Item 8. "Financial Statements and Supplementary Data." of this Form 10-K. SCHEDULE III (continued) SELECTIVE INSURANCE GROUP, INC. AND CONSOLIDATED SUBSIDIARIES SUPPLEMENTARY INSURANCE INFORMATION Year ended December 31, 2015
($ in thousands) |  | Deferred policy acquisition costs |  | Reserve for loss and loss expense |  | Unearned premiums |  | Net premiums earned |  | Net investment income1 |  | Loss and loss expense incurred |  | Amortization of deferred policy acquisition costs |  | Other operating expenses2 |  | Net premiums written
Standard Commercial Lines Segment |  | $ | 171,476 |  |  | 2,998,749 |  |  | 803,648 |  |  | 1,529,442 |  |  | — |  |  | 819,573 |  |  | 323,754 |  |  | 221,619 |  |  | 1,596,965 |
Standard Personal Lines Segment |  | 17,258 |  |  | 265,054 |  |  | 276,533 |  |  | 288,134 |  |  | — |  |  | 200,237 |  |  | 33,638 |  |  | 52,923 |  |  | 283,926 |
E&S Lines Segment |  | 24,425 |  |  | 253,925 |  |  | 89,529 |  |  | 172,333 |  |  | — |  |  | 128,731 |  |  | 42,044 |  |  | 18,361 |  |  | 189,013 |
Investments Segment |  | — |  |  | — |  |  | — |  |  | — |  |  | 134,487 |  |  | — |  |  | — |  |  | — |  |  | — |
Total |  | $ | 213,159 |  |  | 3,517,728 |  |  | 1,169,710 |  |  | 1,989,909 |  |  | 134,487 |  |  | 1,148,541 |  |  | 399,436 |  |  | 292,903 |  |  | 2,069,904 |
1 Includes “Net investment income earned” and “Net realized investment gains” on the Consolidated Statements of Income. 2 “Other operating expenses” of $292,903 reconciles to the Consolidated Statements of Income as follows:
Other insurance expenses | $ | 300,359 |
Other income | (7,456 | )
Total | $ | 292,903 |
See accompanying Report of Independent Registered Public Accounting Firm in Item 8. "Financial Statements and Supplementary Data." of this Form 10-K.

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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 235 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-16) -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e574960-122915 Reference 2: 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 + Details
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