Fair Value Measurements (Tables)

3 Months Ended

Oct. 31, 2017

Fair Value Disclosures [Abstract]

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

	Inputs Considered As
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Fair Values		Balance Sheet Classifications
October 31, 2017
Trading securities	$	13,020	$	—	$	13,020	Other assets
Foreign exchange contracts	—		175		175		Prepaid expenses and other current assets
Total Assets	$	13,020	$	175	$	13,195
Foreign exchange contracts	$	—	$	821	$	821	Other current liabilities
Total Liabilities	$	—	$	821	$	821
July 31, 2017
Trading securities	$	13,994	$	—	$	13,994	Other assets
Foreign exchange contracts	—		1,354		1,354		Prepaid expenses and other current assets
Total Assets	$	13,994	$	1,354	$	15,348
Foreign exchange contracts	$	—	$	1,577	$	1,577	Other current liabilities
Total Liabilities	$	—	$	1,577	$	1,577