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Investments - Unrealized Gains and Losses and Fair Value (Details) - USD ($) $ in Thousands	Oct. 24, 2020	Apr. 25, 2020
Summary of investments
Gross Unrealized  Gains	$ 2,531	$ 1,651
Gross Unrealized  Losses	(25)	(6,446)
Fair Value	50,388	48,022
Equity securities
Summary of investments
Gross Unrealized  Gains	1,873	1,011
Gross Unrealized  Losses	0	(6,390)
Fair Value	16,224	12,692
Fixed income
Summary of investments
Gross Unrealized  Gains	206	268
Gross Unrealized  Losses	(25)	(56)
Fair Value	29,735	30,213
Other
Summary of investments
Gross Unrealized  Gains	452	372
Gross Unrealized  Losses	0	0
Fair Value	$ 4,429	$ 5,117

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- Definition

Cumulative amount of gross unrealized gain on investments.

+ References

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- Definition

Cumulative amount of gross unrealized loss on investments.

+ References

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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 http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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