CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2020	Sep. 27, 2019	Sep. 25, 2020	Sep. 27, 2019
Net income (loss)	$ (5,381)	$ 11,657	$ (42,736)	$ (11,494)
Other comprehensive income (loss) before tax:
Losses reclassified into earnings	0	0	0	56
Change in foreign currency translation adjustments	3,518	(3,431)	3,238	(3,874)
Other comprehensive income (loss) before tax	3,518	(3,431)	3,238	(3,818)
Provision for (benefit from) income taxes	(255)	284	(224)	335
Other comprehensive income (loss), net of tax	3,773	(3,715)	3,462	(4,153)
Total comprehensive income (loss)	$ (1,608)	$ 7,942	$ (39,274)	$ (15,647)