Changes in Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023	Dec. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive income (loss), tax	$ (2)	$ (869)	$ (477)	$ (433)
Foreign currency translation adjustments, tax	0	0	0	0	$ 0	$ 0
Unrealized (losses) gains on marketable securities, tax	(1,499)	(2,707)	(1,499)	(2,707)	(1,728)	(2,308)
Unrealized (Losses) Gains on Cash Flow Hedges	(73)	667	(73)	667	142	(708)
Retirement plans prior service benefit, tax	(1,133)	(1,131)	(1,133)	(1,131)	$ (1,132)	$ (1,130)
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			205	(408)
Amounts reclassified from accumulated other comprehensive income (loss), tax	(2)	0	24	9
Other comprehensive income (loss), tax			229	(399)
Unrealized (Losses) Gains on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications, tax			285	1,816
Amounts reclassified from accumulated other comprehensive income (loss), tax			(500)	(441)
Other comprehensive income (loss), tax			(215)	1,375
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	(1)	(1)
Other comprehensive income (loss), tax			$ (1)	$ (1)