Changes in Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2026	Mar. 30, 2025	Dec. 31, 2025	Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive income (loss), tax	$ (4)	$ (145)
Foreign currency translation adjustments, tax	0	0	$ 0	$ 0
Unrealized (Losses) Gains on Marketable Securities, tax	(2,140)	(2,021)	(1,892)	(2,174)
Unrealized (Losses) Gains on Cash Flow Hedges	0	(15)	0	209
Retirement plans prior service benefit, tax	(1,136)	(1,134)	$ (1,136)	$ (1,134)
Foreign Currency Translation Reclassification Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications, tax	0	0
Amounts reclassified from accumulated other comprehensive income (loss), tax	0	0
Other comprehensive income (loss), tax	0	0
Unrealized (Losses) Gains on Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications, tax	(244)	132
Amounts reclassified from accumulated other comprehensive income (loss), tax	(4)	21
Other comprehensive income (loss), tax	(248)	153
Unrealized (Losses) Gains on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications, tax	0	(58)
Amounts reclassified from accumulated other comprehensive income (loss), tax	0	(166)
Other comprehensive income (loss), tax	0	(224)
Retirement Plans Prior Service Credit
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications, tax	0	0
Amounts reclassified from accumulated other comprehensive income (loss), tax	0	0
Other comprehensive income (loss), tax	$ 0	$ 0