Marketable Debt Securities - Available-for-Sale Marketable Securities (Detail) - USD ($) $ in Thousands	Aug. 26, 2023	Aug. 27, 2022
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	$ 123,887	$ 115,327
Available-For-Sale Marketable Securities, Gross Unrealized Gains	17	1
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(2,391)	(2,783)
Available-For-Sale Marketable Securities, Fair Value	121,513	112,545
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	31,683	15,293
Available-For-Sale Marketable Securities, Gross Unrealized Gains	17	1
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(504)	(298)
Available-For-Sale Marketable Securities, Fair Value	31,196	14,996
Government bonds
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	63,747	88,903
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(1,440)	(1,963)
Available-For-Sale Marketable Securities, Fair Value	62,307	86,940
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	3,215	4,600
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(213)	(243)
Available-For-Sale Marketable Securities, Fair Value	3,002	4,357
Asset-backed securities and other
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	25,242	6,531
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(234)	(279)
Available-For-Sale Marketable Securities, Fair Value	$ 25,008	$ 6,252