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Retirement Plans	12 Months Ended
Retirement Plans	Jul. 31, 2018
Retirement Benefits [Abstract]
Retirement Plans	Retirement Plans We have 401(k) Savings and Retirement Plans for the benefit of eligible U.S. employees. Additionally, our Canadian and certain European subsidiaries maintain profit sharing plans for the benefit of eligible employees. Employer contributions are both discretionary and non-discretionary and are limited in any year to the amount allowable by government tax authorities. Aggregate employer contributions recognized under these plans were $4,676, $3,863 and $3,406 for fiscal 2018, 2017 and 2016, respectively.