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Summary Of Significant Accounting Policies (Policy)
12 Months Ended
Sep. 01, 2012
Summary Of Significant Accounting Policies [Abstract]  
Principles Of Consolidation
Fiscal Year
Use Of Estimates
Cash And Cash Equivalents
Concentrations Of Credit Risk
Allowance For Doubtful Accounts
Inventory Valuation
Property, Plant And Equipment
Goodwill And Other Intangible Assets
Impairment Of Long-Lived Assets
Deferred Catalog Costs
Revenue Recognition
Vendor Consideration
Product Warranties

Product Warranties

The Company generally offers a maximum one-year warranty, including parts and labor, for some of its machinery products. The specific terms and conditions of those warranties vary depending upon the product sold. The Company may be able to recoup some of these costs through product warranties it holds with its original equipment manufacturers, which typically range from thirty to ninety days. In general, many of the Company's general merchandise products are covered by third party original equipment manufacturers' warranties. The Company's warranty expense has been minimal.

Shipping And Handling Costs

Shipping and Handling Costs

The Company includes shipping and handling fees billed to customers in net sales and shipping and handling costs associated with outbound freight in operating expenses in the accompanying consolidated statements of income. The shipping and handling costs in operating expenses were approximately $102,550, $92,442, and $80,854 for the fiscal years ended 2012, 2011, and 2010, respectively.

Self-Insurance
Stock Based Compensation

Stock Based Compensation

In accordance with ASC Topic 718, "Compensation — Stock Compensation" ("ASC 718"), the Company estimates the fair value of share-based payment awards on the date of grant using an option-pricing model. The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service periods in the Company's Consolidated Statements of Income. The Company uses the Black-Scholes option pricing model to determine the grant date fair value and recognizes compensation expense on a straight-line basis over the associate's vesting period or to the employee's retirement eligible date, if earlier.

The stock-based compensation expense related to stock option plans and the Associate Stock Purchase Plan included in operating expenses for fiscal 2012, 2011 and 2010 were $5,656, $5,900 and $6,253, respectively. Tax benefits related to this expense for fiscal 2012, 2011 and 2010 were $2,061, $2,156 and $2,318, respectively. The Company has been granting Non-Qualified Stock Options, which allow the tax benefit to be recorded as options are expensed.

The stock-based compensation expense related to unvested restricted stock awards included in operating expenses was $7,448, $7,053 and $7,272 for the fiscal years 2012, 2011, and 2010 respectively. The stock-based compensation expense related to a restricted stock unit award included in operating expenses was $2,158 and $1,815 for the fiscal years 2012 and 2011 respectively.

Related Party Transactions
Fair Value Of Financial Instruments

Fair Value of Financial Instruments

The carrying values of the Company's financial instruments, including cash, receivables, accounts payable and accrued liabilities approximate fair value because of the short maturity of these instruments. In addition, based on borrowing rates currently available to the Company for borrowings with similar terms, the carrying values of the Company's capital lease obligations also approximate fair value. Under this method, the Company's fair value of any long-term obligations was not significantly different than the carrying values at September 1, 2012 and August 27, 2011.

Foreign Currency

Foreign Currency

The local currency is the functional currency for all of MSC's operations outside the United States. Assets and liabilities of these operations are translated to U.S. dollars at the exchange rate in effect at the end of each period. Income statement accounts are translated at the average exchange rate prevailing during the period. Translation adjustments arising from the use of differing exchange rates from period to period are included as a component of other comprehensive income within shareholders' equity. Gains and losses from foreign currency transactions are included in net income for the period.

Income Taxes

Income Taxes

The Company has established deferred income tax assets and liabilities for temporary differences between the financial reporting bases and the income tax bases of its assets and liabilities at enacted tax rates expected to be in effect when such assets or liabilities are realized or settled pursuant to the provisions of ASC Topic 740, "Income Taxes" ("ASC 740"), which prescribes a comprehensive model for the financial statement recognition, measurement, classification, and disclosure of uncertain tax positions. For those benefits to be recognized, a tax position must be more-likely-than-not to be sustained upon examination by taxing authorities. The amounts of unrecognized tax benefits, exclusive of interest and penalties that would affect the effective tax rate were $5,376 and $8,272 as of September 1, 2012 and August 27, 2011, respectively.

Geographic Regions

Geographic Regions

The Company's sales and assets are predominantly generated from United States locations. Sales and assets related to the United Kingdom (the "U.K.") and Mexico branches are not significant to the Company's total operations. For fiscal 2012, the U.K. operations represented less than 3% of the Company's consolidated net sales and the Mexico operations represented less than 1% of the Company's consolidated net sales.

Segment Reporting

Segment Reporting

The Company utilizes the management approach for segment disclosure, which designates the internal organization that is used by management for making operating decisions and assessing performance as the source of our reportable segments. The Company's results of operations are reviewed by the Chief Executive Officer and the Chief Financial Officer on a consolidated basis and the Company operates in only one segment. Substantially all of the Company's revenues and long-lived assets are in the United States.