Derivatives and Hedging Activities - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
Apr. 30, 2021	Jul. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Maturities	18 months
Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months	$ 860	$ (385)

The estimated net amount of unrealized gains or losses on foreign currency cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994

Name:	us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant