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Description of Business	12 Months Ended
	Jan. 01, 2012
Description of Business/Summary of Significant Accounting Policies [Abstract]
Description of Business	(1) Description of Business The accompanying consolidated financial statements as of January 1, 2012 and January 2, 2011 and for the years ended January 1, 2012 (“fiscal 2011”), January 2, 2011 (“fiscal 2010”) and January 3, 2010 (“fiscal 2009”), represent the financial position, results of operations and cash flows of Big 5 Sporting Goods Corporation (the “Company”) and its wholly owned subsidiary, Big 5 Corp. and Big 5 Corp.’s wholly owned subsidiary, Big 5 Services Corp. The Company operates as one business segment, as a sporting goods retailer under the “Big 5 Sporting Goods” name. The Company carries a full-line product offering, operating 406 stores at January 1, 2012 in California, Washington, Arizona, Oregon, Texas, New Mexico, Nevada, Utah, Idaho, Colorado, Oklahoma and Wyoming.

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The entire disclosure for the business description and basis of presentation concepts. Business description describes the nature and type of organization including but not limited to organizational structure as may be applicable to holding companies, parent and subsidiary relationships, business divisions, business units, business segments, affiliates and information about significant ownership of the reporting entity. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).

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