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Retirement Benefits - Summary of Expected Benefit Payments (Detail) $ in Thousands	Apr. 30, 2023 USD ($)
Retirement Benefits [Abstract]
2024	$ 1,640
2025	1,620
2026	1,600
2027	1,560
2028	1,540
2029- 2033	$ 7,030

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Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
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Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year.

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year.

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