Fair Value Measurements - Additional Information (Details) $ in Thousands	12 Months Ended
	Apr. 24, 2021 USD ($)	Apr. 25, 2020 USD ($) investment	Apr. 27, 2019 USD ($)	Jul. 27, 2019 investment
Fair Value Disclosures [Abstract]
Gain on investment	$ 0	$ 34,334	$ 4,477
Number of investments | investment		1		1
Investment	51,628	$ 51,628
Estimated fair value of debt	610,811	601,856
Long-term debt	$ 588,295	$ 587,766