Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 24, 2022	Sep. 30, 2023	Sep. 24, 2022
Net income	$ 3,915	$ 24,882	$ 30,184	$ 75,219
Other comprehensive loss, net of tax:
Foreign currency translation adjustments	(10,436)	(22,520)	(7,377)	(43,960)
Adjustments related to postretirement benefits	(123)	(129)	63	(302)
Change in unrealized gain/loss on investments	153	(372)	361	(882)
Other comprehensive loss, net of tax	(10,406)	(23,021)	(6,953)	(45,144)
Comprehensive income (loss)	$ (6,491)	$ 1,861	$ 23,231	$ 30,075