Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (2,138)	$ (104,565)
Components of other comprehensive income (loss):
Translation adjustment	(775)	(21)
Net change in derivatives (Note 11)	1,688	185
Net loss on long-term pension liability obligation	(49)	0
Income taxes	(141)	(65)
Total other comprehensive income	723	99
Total comprehensive loss	(1,415)	(104,466)
Comprehensive loss attributable to noncontrolling interests and redeemable noncontrolling interests	707	14,841
Comprehensive loss attributable to stockholders	$ (708)	$ (89,625)