Stock Incentive Plans - Stock Option Activity (Details) - 2014 Stock Incentive Plan - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Performance-Based
Number of Options Outstanding
Outstanding, beginning balance (shares)	6,524,152
Exercised (shares)	(2,051,033)	0	0
Forfeited (shares)	(329,338)
Outstanding, ending balance (shares)	4,143,781	6,524,152
Vested and exercisable (shares)	1,737,952
Weighted Average Exercise Price ($)
Outstanding, beginning balance (usd per share)	$ 6.07
Exercised (usd per share)	5.87	$ 3.68	$ 3.49
Forfeited (usd per share)	5.33
Outstanding, ending balance (usd per share)	6.23	$ 6.07
Vested and exercisable (usd per share)	$ 5.87
Outstanding, weighted average remaining contractual term (years)	5 years 10 months 28 days
Vested and exercisable, weighted average remaining contractual term (years)	5 years 9 months 15 days
Outstanding, aggregate intrinsic value	$ 94,291
Vested and exercisable, aggregate intrinsic value	$ 40,172
Number of options granted (shares)	0
Service-Based
Number of Options Outstanding
Outstanding, beginning balance (shares)	3,822,915
Exercised (shares)	(1,278,223)
Forfeited (shares)	(70,185)
Outstanding, ending balance (shares)	2,474,507	3,822,915
Vested and exercisable (shares)	1,212,053
Weighted Average Exercise Price ($)
Outstanding, beginning balance (usd per share)	$ 7.22
Exercised (usd per share)	5.67	$ 9.01	$ 8.58
Forfeited (usd per share)	7.42
Outstanding, ending balance (usd per share)	8.02	$ 7.22
Vested and exercisable (usd per share)	$ 7.35
Outstanding, weighted average remaining contractual term (years)	6 years 3 months 4 days
Vested and exercisable, weighted average remaining contractual term (years)	5 years 9 months 22 days
Outstanding, aggregate intrinsic value	$ 51,877
Vested and exercisable, aggregate intrinsic value	$ 26,219
Number of options granted (shares)	0