Schedule of Unrealized Loss on Available-for-Sale Investments (Detail) - USD ($) $ in Thousands	Dec. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value	$ 3,506	$ 56,275
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	42	1,616
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	103,453	78,406
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	6,621	9,148
Available-for-sale investments with unrealized losses, Fair Value, Total	106,959	134,681
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	6,663	10,764
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value	0	0
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	0	0
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	14,307	16,016
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	2,236	2,889
Available-for-sale investments with unrealized losses, Fair Value, Total	14,307	16,016
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	2,236	2,889
Corporate bonds and direct obligations of government agencies
Debt Securities, Available-for-sale [Line Items]
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value	3,506	54,031
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	42	1,516
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	86,841	62,390
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	4,342	6,259
Available-for-sale investments with unrealized losses, Fair Value, Total	90,347	116,421
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	4,384	7,775
U.S. Treasury obligations
Debt Securities, Available-for-sale [Line Items]
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value	0	2,244
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	0	100
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	2,305	0
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	43	0
Available-for-sale investments with unrealized losses, Fair Value, Total	2,305	2,244
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	$ 43	$ 100