Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022	Dec. 25, 2021
Net income	$ 28,156	$ 96,847	$ 167,325
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments	6,815	(17,950)	(22,956)
Adjustments related to postretirement benefits, net of tax	(2,375)	5,894	2,602
Change in unrealized gain/loss on investments	793	(694)	(67)
Reclassification due to sale of PBC Test Business, net of tax	0	0	(2,515)
Other comprehensive income (loss), net of tax	5,233	(12,750)	(22,936)
Comprehensive income	$ 33,389	$ 84,097	$ 144,389