Equity Compensation - Options (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 27, 2015	Dec. 28, 2014	Dec. 29, 2013
Number of Options
Number of Options, Outstanding (in shares)	1,564,000
Number of Options, Granted (in shares)	330,000	293,000	498,000
Number of Options, Exercised (in shares)	(441,000)	(759,000)	(697,000)
Number of Options, Cancelled (in shares)	(34,000)
Number of Options, Outstanding (in shares)	1,419,000	1,564,000
Number of Options, Exercisable (in shares)	817,000
Weighted Average Exercise Price
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 24.52
Weighted Average Exercise Price, Granted (in dollars per share)	64.51
Weighted Average Exercise Price, Exercised (in dollars per share)	18.18
Weighted Average Exercise Price, Cancelled (in dollars per share)	53.21
Weighted Average Exercise Price, Outstanding (in dollars per share)	35.10	$ 24.52
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 21.77
Options, Additional Disclosures
Weighted Average Remaining Contractual Term, Outstanding	6 years 3 months 11 days
Weighted Average Remaining Contractual Term, Exercisable	4 years 7 months 10 days
Aggregate Intrinsic Value, Outstanding	$ 31,521
Aggregate Intrinsic Value, Exercisable	$ 27,429