Schedule of Unrealized Loss on Available-for-Sale Investments (Detail) - USD ($) $ in Thousands	Dec. 25, 2021	Dec. 26, 2020
Debt Securities, Available-for-sale [Line Items]
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value	$ 94,621	$ 3,222
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	1,312	98
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	0
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	0
Available-for-sale investments with unrealized losses, Fair Value, Total	94,621	3,222
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	1,312	98
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value	22,095	541
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	346	26
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	0
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	0
Available-for-sale investments with unrealized losses, Fair Value, Total	22,095	541
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	346	26
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	72,526	2,681
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	966	72
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	0
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	0
Available-for-sale investments with unrealized losses, Fair Value, Total	72,526	2,681
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	$ 966	$ 72

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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