Components of and Changes in Accumulated Other Comprehensive Income, Net of Related Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 24, 2022	Sep. 25, 2021	Sep. 24, 2022	Sep. 25, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ 862,010
Other comprehensive loss	$ (3,080)	$ (1,087)	(9,998)	$ (940)
Ending Balance	873,173		873,173
Unrealized Holding Gains (Losses) on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			113
Other comprehensive loss			(8,987)
Ending Balance	(8,874)		(8,874)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(5,516)
Other comprehensive loss			(1,011)
Ending Balance	(6,527)		(6,527)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(5,403)
Other comprehensive loss			(9,998)
Ending Balance	$ (15,401)		$ (15,401)