CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 27, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 22,321	$ 4,725
Other comprehensive income/(loss), before tax:
Gain/(Loss) on foreign currency translation adjustments	848	(2,209)
Pension and postretirement benefits obligation	1,553	5,010
Net unrealized gain/(loss) on available-for-sale securities	2,602	(7,916)
Other comprehensive income/(loss), before tax	5,003	(5,115)
Income tax expense/(benefit)	1,294	(1,380)
Other comprehensive income/(loss), net of tax	3,709	(3,735)
Comprehensive income attributable to common stockholders	$ 26,030	$ 990