Basic and Diluted Net Loss Per Common Share - Computation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Earnings Per Share [Abstract]
Net loss	$ (99,268)	$ (121,601)
Weighted average common shares outstanding - basic and diluted (in shares)	182,024	176,406
Net loss per common share - basic and diluted (in dollars per share)	$ (0.55)	$ (0.69)