Share-Based Compensation - Stock Option Activity (Details) - Stock options - USD ($) $ / shares in Units, shares in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Stock Options (in thousands)
Beginning balance (in shares)	5,446	5,006	4,474
Granted (in shares)	1,138	1,182	734
Exercised (in shares)	(91)	(734)	(169)
Forfeited or expired (in shares)	0	(8)	(33)
Ending balance (in shares)	6,493	5,446	5,006	4,474
Weighted average exercise price
Beginning balance (in USD per share)	$ 12.30	$ 11.41	$ 10.32
Granted (in USD per share)	13.68	14.67	17.50
Exercised (in USD per share)	10.47	10.04	9.21
Forfeited or expired (in USD per share)	0	10.64	10.28
Ending balance (in USD per share)	$ 12.57	$ 12.30	$ 11.41	$ 10.32
Exercisable shares, Ending balance	4,336
Vested or expected to vest (in shares)	6,493
Exercisable (in USD per share)	$ 11.64
Vested or expected to vest (USD per share)	$ 12.57
Outstanding balance (years)	6 years 10 months 24 days	7 years 3 months 18 days	8 years 1 month 6 days	8 years 9 months 18 days
Exercisable (years)	5 years 9 months 18 days
Vested or expected to vest (years)	6 years 10 months 24 days
Beginning balance	$ 11,993,000.0	$ 26,952,300	$ 5,623,300
Exercised	389,100	4,408,100	1,092,900
Ending balance	11,045,400	$ 11,993,000.0	$ 26,952,300	$ 5,623,300
Exercisable	11,018,600
Vested or expected to vest	$ 11,045,400