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Organization | 6 Months Ended
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Jun. 30, 2011
Organization [Abstract] |
Organization | NOTE 1. Organization Selective Insurance Group, Inc., through its subsidiaries, (collectively referred to as "we," "us," or "our") offers property and casualty insurance products. Selective Insurance Group, Inc. (referred to as the "Parent") was incorporated in New Jersey in 1977 and its main offices are located in Branchville, New Jersey. The Parent's common stock is publicly traded on the NASDAQ Global Select Market under the symbol "SIGI." We classify our business into two operating segments: Insurance Operations, which sells property and casualty insurance products and services primarily in 22 states in the Eastern and Midwestern U.S.; and Investments.

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- Definition Describes the nature of an entity's business, the major products or services it sells or provides and its principal markets, including the locations of those markets. If the entity operates in more than one business, the disclosure also indicates the relative importance of its operations in each business and the basis for the determination (for example, assets, revenues, or earnings). Disclosures about the nature of operations need not be quantified; relative importance could be conveyed by use of terms such as "predominately", "about equally", or "major and other". This element is also referred to as "Business Description". + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 94-6 -Paragraph 10 + Details
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