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Investments - Unrealized Gains and Losses and Fair Value (Details) - USD ($) $ in Thousands	Jan. 28, 2023	Apr. 30, 2022
Summary of investments
Gross Unrealized  Gains	$ 2,571	$ 2,726
Gross Unrealized  Losses	(809)	(895)
Fair Value	39,650	51,537
Equity securities
Summary of investments
Gross Unrealized  Gains	1,316	1,448
Gross Unrealized  Losses	(94)	(86)
Fair Value	14,213	13,905
Fixed income
Summary of investments
Gross Unrealized  Gains	45	28
Gross Unrealized  Losses	(715)	(809)
Fair Value	21,201	33,521
Other
Summary of investments
Gross Unrealized  Gains	1,210	1,250
Gross Unrealized  Losses	0	0
Fair Value	$ 4,236	$ 4,111

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Cumulative amount of gross unrealized gain on investments.

+ References

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- Definition

Cumulative amount of gross unrealized loss on investments.

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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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