CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 03, 2021	Apr. 04, 2020
Income Statement [Abstract]
Sales	$ 1,267,032	$ 1,113,811
Cost of sales	1,007,303	882,924
Gross profit	259,729	230,887
Selling, general and administrative expenses	153,168	164,954
Intangible asset amortization	46,202	44,861
Restructuring and impairment charges, net	1,838	13,835
Strategic development and acquisition related costs	3,313	4,857
Goodwill impairment	0	503,171
Income (loss) from operations	55,208	(500,791)
Interest income	117	338
Interest expense	(56,499)	(54,835)
Foreign exchange loss	(26)	(4,137)
Other income (expense), net	337	(662)
Loss before income taxes	(863)	(560,087)
Provision (benefit) for income taxes	792	(18,014)
Net loss	(1,655)	(542,073)
Net income allocated to participating securities	0	0
Net loss applicable to common shares	$ (1,655)	$ (542,073)
Loss per common share:
Basic (in USD per share)	$ (0.01)	$ (4.30)
Diluted (in USD per share)	$ (0.01)	$ (4.30)
Weighted average number of common shares outstanding:
Basic (in shares)	125,506	126,093
Diluted (in shares)	125,506	126,093