Income Taxes	9 Months Ended
May 31, 2013
Income Taxes [Abstract]
Income Taxes	Note 13. Income Taxes The Company uses an estimated annual effective tax rate, which is based on expected annual income, statutory tax rates and tax planning opportunities available in the various jurisdictions in which the Company operates, to determine its quarterly provision for income taxes. Certain significant or unusual items are separately recognized in the quarter in which they occur and can be a source of variability in the effective tax rates from quarter to quarter. The provision for income taxes was 30.6% and 29.0% of income before income taxes for the three months ended May 31, 2013 and 2012, respectively and 30.6% and 29.3% of income before income taxes for the nine months ended May 31, 2013 and 2012, respectively. The increase in the effective income tax rate from period to period for both the three months and nine months was primarily driven by the release of uncertain tax position reserves associated with expiring statutes in fiscal year 2012 that did not reoccur in the current fiscal year. The total amount of unrecognized tax benefits, excluding associated interest and penalties, was $0.9 million as of May 31, 2013, of which $0.7 million would impact the effective tax rate if recognized. The gross liability for income taxes related to unrecognized tax benefits is included in other long-term liabilities in the Company’s condensed consolidated balance sheets. The total balance of accrued interest and penalties related to uncertain tax positions was $0.3 million as of May 31, 2013 and August 31, 2012. The Company recognizes interest and penalties related to uncertain tax positions as a component of income tax expense and the accrued interest and penalties are included in deferred and other long-term liabilities in the Company’s condensed consolidated balance sheets. There were no material interest or penalties included in income tax expense for each of the three and nine months ended May 31, 2013 and 2012. During the three months ended May 31, 2013, the Company released a portion of its reserve for uncertain tax positions, excluding interest, of $0.2 million associated primarily with the expiration of the statute of limitations for years in which the Company recorded a reserve for uncertain tax positions for state tax purposes. This benefit was partially offset by a charge to tax expense for $0.1 million, excluding interest, relating to a reserve for uncertain tax positions in the current fiscal year. The Company is subject to taxation in the U.S. and in various state and foreign jurisdictions. Due to expired statutes, the Company’s federal income tax returns for years prior to fiscal year 2010 are not subject to examination by the U.S. Internal Revenue Service. Generally, for the majority of state and foreign jurisdictions where the Company does business, periods prior to fiscal year 2009 are no longer subject to examination. The Company has estimated that up to $0.2 million of unrecognized tax benefits related to income tax positions may be affected by the resolution of tax examinations or expiring statutes of limitation within the next twelve months. Audit outcomes and the timing of settlements are subject to significant uncertainty.

Income Taxes

9 Months Ended

May 31, 2013

Note 13. Income Taxes

The Company uses an estimated annual effective tax rate, which is based on expected annual income, statutory tax rates and tax planning opportunities available in the various jurisdictions in which the Company operates, to determine its quarterly provision for income taxes. Certain significant or unusual items are separately recognized in the quarter in which they occur and can be a source of variability in the effective tax rates from quarter to quarter.

The provision for income taxes was 30.6% and 29.0% of income before income taxes for the three months ended May 31, 2013 and 2012, respectively and 30.6% and 29.3% of income before income taxes for the nine months ended May 31, 2013 and 2012, respectively. The increase in the effective income tax rate from period to period for both the three months and nine months was primarily driven by the release of uncertain tax position reserves associated with expiring statutes in fiscal year 2012 that did not reoccur in the current fiscal year.

The total amount of unrecognized tax benefits, excluding associated interest and penalties, was $0.9 million as of May 31, 2013, of which $0.7 million would impact the effective tax rate if recognized. The gross liability for income taxes related to unrecognized tax benefits is included in other long-term liabilities in the Company’s condensed consolidated balance sheets.

The total balance of accrued interest and penalties related to uncertain tax positions was $0.3 million as of May 31, 2013 and August 31, 2012. The Company recognizes interest and penalties related to uncertain tax positions as a component of income tax expense and the accrued interest and penalties are included in deferred and other long-term liabilities in the Company’s condensed consolidated balance sheets. There were no material interest or penalties included in income tax expense for each of the three and nine months ended May 31, 2013 and 2012.

During the three months ended May 31, 2013, the Company released a portion of its reserve for uncertain tax positions, excluding interest, of $0.2 million associated primarily with the expiration of the statute of limitations for years in which the Company recorded a reserve for uncertain tax positions for state tax purposes. This benefit was partially offset by a charge to tax expense for $0.1 million, excluding interest, relating to a reserve for uncertain tax positions in the current fiscal year.

The Company is subject to taxation in the U.S. and in various state and foreign jurisdictions. Due to expired statutes, the Company’s federal income tax returns for years prior to fiscal year 2010 are not subject to examination by the U.S. Internal Revenue Service. Generally, for the majority of state and foreign jurisdictions where the Company does business, periods prior to fiscal year 2009 are no longer subject to examination. The Company has estimated that up to $0.2 million of unrecognized tax benefits related to income tax positions may be affected by the resolution of tax examinations or expiring statutes of limitation within the next twelve months. Audit outcomes and the timing of settlements are subject to significant uncertainty.