Common Shares and Net Income (Loss) per Common Share - Anti-dilutive Securities Excluded from the Computation (Details) - shares shares in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation of diluted income (loss) per common share (in shares)	6,477	5,378
Performance-based RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation of diluted income (loss) per common share (in shares)	750	1,252
Time-based RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation of diluted income (loss) per common share (in shares)	557	374