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Investments - Summary of Unrealized Gains, Unrealized Losses and Fair Value (Details) - USD ($) $ in Thousands	Apr. 25, 2020	Apr. 27, 2019
Investments
Gross Unrealized Gains	$ 1,651	$ 2,174
Gross Unrealized Losses	(6,446)	(124)
Fair Value	48,022	57,421
Equity securities
Investments
Gross Unrealized Gains	1,011	1,841
Gross Unrealized Losses	(6,390)	0
Fair Value	12,692	19,535
Fixed income
Investments
Gross Unrealized Gains	268	75
Gross Unrealized Losses	(56)	(111)
Fair Value	30,213	33,217
Other
Investments
Gross Unrealized Gains	372	258
Gross Unrealized Losses	0	(13)
Fair Value	$ 5,117	$ 4,669

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- Definition

Cumulative amount of gross unrealized gain on investments.

+ References

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

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