Income Taxes	3 Months Ended
Oct. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The effective tax rate for the three months ended October 31, 2016 was 27.3% compared to 27.9% for the three months ended October 31, 2015. The decrease in the Company’s effective tax rate for the three months ended October 31, 2016 was primarily due to a reduction in the Company's tax rate prior to discrete items, which was driven by the permanent reinstatement of the U.S. Research and Experimentation Credit during the second quarter of the prior year and a favorable shift in mix of earnings between tax jurisdictions. The Company files income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. With few exceptions, the Company is no longer subject to state and foreign income tax examinations by tax authorities for years before 2008. The United States Internal Revenue Service has completed examinations of the Company’s U.S. federal income tax returns through 2012. At October 31, 2016, the total unrecognized tax benefits were $16.2 million and accrued interest and penalties on these unrecognized tax benefits were $1.9 million. The Company recognizes accrued interest related to unrecognized tax benefits in income tax expense. If the Company were to prevail on all unrecognized tax benefits, substantially all of the unrecognized tax benefits would benefit the effective tax rate. With an average statute of limitations of about five years, up to $1.3 million of the unrecognized tax benefits could potentially expire in the next 12 month period unless extended by an audit. It is possible that quicker than expected settlement of either current audits, future audits or disputes would cause additional reversals of previously recorded reserves in the next 12 month period. Quantification of an estimated range and timing of future audit settlements cannot be made at this time.

Income Taxes

3 Months Ended

Oct. 31, 2016

The effective tax rate for the three months ended October 31, 2016 was 27.3% compared to 27.9% for the three months ended October 31, 2015. The decrease in the Company’s effective tax rate for the three months ended October 31, 2016 was primarily due to a reduction in the Company's tax rate prior to discrete items, which was driven by the permanent reinstatement of the U.S. Research and Experimentation Credit during the second quarter of the prior year and a favorable shift in mix of earnings between tax jurisdictions.

The Company files income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. With few exceptions, the Company is no longer subject to state and foreign income tax examinations by tax authorities for years before 2008. The United States Internal Revenue Service has completed examinations of the Company’s U.S. federal income tax returns through 2012.

At October 31, 2016, the total unrecognized tax benefits were $16.2 million and accrued interest and penalties on these unrecognized tax benefits were $1.9 million. The Company recognizes accrued interest related to unrecognized tax benefits in income tax expense. If the Company were to prevail on all unrecognized tax benefits, substantially all of the unrecognized tax benefits would benefit the effective tax rate. With an average statute of limitations of about five years, up to $1.3 million of the unrecognized tax benefits could potentially expire in the next 12 month period unless extended by an audit. It is possible that quicker than expected settlement of either current audits, future audits or disputes would cause additional reversals of previously recorded reserves in the next 12 month period. Quantification of an estimated range and timing of future audit settlements cannot be made at this time.