Derivatives and Hedging Activities (Tables)

3 Months Ended

Oct. 31, 2019

Jul. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]

	Three months ended October 31,
	2019		2018
Gains (losses) recognized in OCI:
Foreign exchange contracts (cash flow hedges)	$	196	$	(380	)
Foreign currency denominated debt (net investment hedges)	22		1,620
Gains reclassified from OCI into cost of goods sold:
Forward exchange contracts (cash flow hedges)	381		47

Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]

	October 31, 2019		July 31, 2019
Designated as cash flow hedges	$	19,540	$	26,013
Non-designated hedges	3,385		3,376
Total foreign exchange contracts	$	22,925	$	29,389

Fair Values of Derivative Instruments in Consolidated Balance Sheets

Fair values of derivative instruments in the condensed consolidated balance sheets were as follows: 

	October 31, 2019						July 31, 2019
	Prepaid expenses and other current assets		Other current liabilities		Current maturities on long-term obligations		Prepaid expenses and other current assets		Other current liabilities		Current maturities on long-term obligations
Derivatives designated as hedging instruments:
Foreign exchange contracts (cash flow hedges)	$	591	—		—		$	472	—		—
Foreign currency denominated debt (net investment hedges)	—		—		50,166		—		—		50,189
Derivatives not designated as hedging instruments:
Foreign exchange contracts	4		12		—		2		5		—
Total derivative instruments	$	595	$	12	$	50,166	$	474	$	5	$	50,189