Schedule of Unrealized Loss on Available-for-Sale Investments (Detail) - USD ($) $ in Thousands	Jul. 01, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value	$ 25,258	$ 56,275
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	276	1,616
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	110,334	78,406
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	9,493	9,148
Available-for-sale investments with unrealized losses, Fair Value, Total	135,592	134,681
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	9,769	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	14,934	16,016
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	2,705	2,889
Available-for-sale investments with unrealized losses, Fair Value, Total	14,934	16,016
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	2,705	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	19,035	54,031
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	262	1,516
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	93,141	62,390
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	6,700	6,259
Available-for-sale investments with unrealized losses, Fair Value, Total	112,176	116,421
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	6,962	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	6,223	2,244
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	14	100
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	2,259	0
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	88	0
Available-for-sale investments with unrealized losses, Fair Value, Total	8,482	2,244
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	$ 102	$ 100