Derivatives and Hedging Activities - Impact on OCI (Details) - USD ($) $ in Thousands	12 Months Ended
Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss) gain recognized in other comprehensive loss			$ 966
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	$ 614	$ 1,048	(551)
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss) gain recognized in other comprehensive loss	(576)	837	966
Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss) gain recognized in other comprehensive loss	$ 1,517	$ 2,480	$ 612

Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
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-Section 45
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-URI http://asc.fasb.org/extlink&oid=121558989&loc=d3e80720-113993

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580

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