Earnings (Loss) Per Share - Narrative (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options and other share-based awards (in shares)	0	518	0	523
Antidilutive securities excluded from computation of earnings per share, shares would have been included if no net loss (in shares)	648		900
Antidilutive securities excluded from computation of earnings per share, amount, treasury stock method (in shares)	148		260
Employee stock option and restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	4,030	1,570	4,043	1,631