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Basis Of Presentation
3 Months Ended
Mar. 31, 2012
Basis Of Presentation [Abstract]  
Basis Of Presentation

Use of Estimates

The preparation of condensed consolidated unaudited financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated unaudited financial statements and the reported amounts of revenues and expenses for the reporting period. Significant estimates include valuation reserves for accounts receivable, inventory and income taxes, reserves related to self-insurance programs and valuation of goodwill and indefinite lived intangible assets. While we believe that these estimates are reasonable, actual results could differ from such estimates.

 Accounting Changes

Presentation of Comprehensive Income

In June 2011, the Financial Accounting Standards Board issued guidance that required companies to present net income and other comprehensive income in one continuous statement or in two separate but consecutive statements. We added new primary consolidated statements of other comprehensive income which immediately follow our condensed consolidated unaudited statements of income to our condensed consolidated unaudited financial statements.