Employee Benefit Plans - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2019
Retirement Benefits [Abstract]
Deferred compensation arrangement with individual, recorded liability	$ 20,144	$ 18,606
Accrued retirement and profit-sharing contributions	3,686	3,577
Pension and other postretirement benefit expense	$ 13,246	$ 12,129	$ 14,158

The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 710
-SubTopic 10
-Section 30
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363

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