Stock-Based Compensation (Stock Option Activity) (Details) (Stock Option [Member], USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 30, 2014		Dec. 31, 2013	Jan. 01, 2013
Stock Option [Member]
Options, Outstanding
Outstanding, beginning of period	3,309,872		2,973,167	2,621,023
Granted	269,552		555,273	516,473
Forfeited	(73,673)		(55,389)	(164,329)
Exercised	(260,487)		(163,179)	0
Outstanding, end of period	3,245,264		3,309,872	2,973,167
Vested and expected to vest	3,218,628
Exercisable	2,504,436
Weighted Average Exercise Price
Weighted- average exercise price, beginning balance (USD per share)	$ 10.59		$ 9.12	$ 8.67
Granted (USD per share)	$ 30.40		$ 18.06	$ 11.27
Forfeited (USD per share)	$ 19.72		$ 11.89	$ 8.68
Exercised (USD per share)	$ 8.85		$ 8.72	$ 0.00
Weighted- average exercise price, ending balance (USD per share)	$ 12.17		$ 10.59	$ 9.12
Vested and expected to vest (USD per share)	$ 12.08
Exercisable (USD per share)	$ 9.80
Weighted- Average Remaining Years of Contractual Life
Outstanding	6 years 10 months 10 days
Vested and expected to vest	6 years 10 months 2 days
Exercisable	6 years 4 months 2 days
Aggregate Intrinsic Value
Outstanding	$ 47,385	[1]
Vested and expected to vest	47,222	[1]
Exercisable	$ 41,561	[1]

[1] Aggregate intrinsic value represents the amount by which fair value of the Company's stock exceeds the exercise price of the option as of December 30, 2014.