Business Combination

12 Months Ended

Dec. 31, 2011

Business Combination

Business Combination

NOTE 2 — BUSINESS COMBINATION

Effective July 11, 2008, the Company acquired CSK, which was one of the largest specialty retailers of auto parts and accessories in the Western United States and one of the largest such retailers in the United States, based on store count at the date of acquisition.  The acquisition was accounted for under the purchase method of accounting with O'Reilly Automotive, Inc. as the acquiring entity in accordance with the Statement of Financial Accounting Standard No. 141, Business Combinations.  The purchase price to acquire CSK was $542.2 million and was finalized on June 30, 2009.  The consideration paid by the Company to complete the acquisition was allocated to the assets acquired and liabilities assumed based upon their estimated fair values as of the date of the acquisition.  The results of CSK's operations have been included in the Company's consolidated financial statements since July 11, 2008, the acquisition date.