Fair Value Measurements - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
Apr. 25, 2020	Apr. 27, 2019	Apr. 28, 2018
Fair Value Disclosures [Abstract]
Gain on investment	$ 34,334	$ 4,477	$ 0
Investments	51,628	17,294
Estimated fair value of debt	601,856	758,121
Long-term debt	$ 587,766	$ 749,316

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
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Amount of realized and unrealized gain (loss) on investment.

+ References

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Sum of the carrying amounts as of the balance sheet date of all investments.

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
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