Consolidated Condensed Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2020	Sep. 30, 2019	Sep. 28, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net (loss) income	$ (41,451)	$ 15,870	$ 138,575	$ 16,042
Other comprehensive income (loss), net of tax:
Pension obligation adjustments, net	(17)	(23)	4	(4)
Reclassification adjustment for foreign currency translation	(346)		(346)
Derecognition of foreign currency translation adjustments due to sale of Mobility business unit			(27,341)
Foreign currency translation adjustments, net	1,049	(954)	778	(925)
Derecognition of unrealized losses on cash flow hedge due to sale of Mobility business unit			384
Net unrealized losses on cash flow hedges:
Unrealized loss on effective cash flow hedges during the period, net	(655)	(1,833)	(8,667)	(8,164)
Loss realized in the statement of operations, net	2,098	554	4,727	1,128
Net	1,443	(1,279)	(3,940)	(7,036)
Other comprehensive income (loss), net of tax	2,129	(2,256)	(30,461)	(7,965)
Comprehensive (loss) income, net of tax	$ (39,322)	$ 13,614	$ 108,114	$ 8,077