Components of and Changes in Accumulated Other Comprehensive Income, Net of Related Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 25, 2022	Jun. 26, 2021	Jun. 25, 2022	Jun. 26, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ 862,010
Other comprehensive (loss) income	$ (3,006)	$ 1,101	(6,918)	$ 147
Ending Balance	856,870		856,870
Unrealized Holding Gains (Losses) on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			113
Other comprehensive (loss) income			(7,391)
Ending Balance	(7,278)		(7,278)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(5,516)
Other comprehensive (loss) income			473
Ending Balance	(5,043)		(5,043)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(5,403)
Other comprehensive (loss) income			(6,918)
Ending Balance	$ (12,321)		$ (12,321)