Fair Value Measurements (Tables)

3 Months Ended

Oct. 31, 2019

Fair Value Disclosures [Abstract]

Financial Assets and Liabilities Accounted for at Fair Value on a Recurring Basis

	October 31, 2019		July 31, 2019		Fair Value Hierarchy
Assets:
Trading securities	$	15,212	$	15,744	Level 1
Foreign exchange contracts	595		474		Level 2
Liabilities:
Foreign exchange contracts	12		5		Level 2

Schedule of Debt [Table Text Block]

	October 31, 2019				July 31, 2019
	Carrying Value		Fair Value		Carrying Value		Fair Value
Current maturities on long-term debt	$	50,144	$	51,076	$	50,166	$	51,566