LEASES - Schedule of Weighted-Average Lease Term and Discount Rate (Details)	Apr. 30, 2022	Apr. 30, 2021
Leases [Abstract]
Weighted-average remaining lease term (years) for operating lease liabilities	10 years 2 months 12 days	10 years 8 months 12 days
Weighted-average discount rate for operating lease liabilities	3.60%	3.66%

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980

Name:	us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant