Stock-Based Compensation (Details 2) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jul. 01, 2014	Jun. 30, 2015	Jul. 01, 2014	Dec. 30, 2014
Stock options
Stock option activity, shares
Outstanding, at the beginning of the period (in shares)			4,023
Granted (in shares)			312
Exercised (in shares)			(744)
Forfeited or cancelled (in shares)			(23)
Outstanding at the end of the period (in shares)	3,568		3,568		4,023
Exercisable at the end of the period (in shares)	2,061		2,061
Weighted Average Exercise price
Outstanding at the beginning of the period (in dollars per share)			$ 26.34
Granted (in dollars per share)			48.01
Exercised (in dollars per share)			22.71
Forfeited or cancelled (in dollars per share)			19.96
Outstanding at the end of the period (in dollars per share)	$ 29.02		29.02		$ 26.34
Exercisable at the end of the period (in dollars per share)	$ 24.40		$ 24.40
Weighted Average Remaining Contractual Term
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2			3 years 9 months 18 days		3 years 8 months 12 days
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2			3 years 9 months 18 days		3 years 8 months 12 days
Exercisable at the end of the period			2 years 9 months 18 days
Aggregate Intrinsic Value
Outstanding at the beginning of the period			$ 97,406
Outstanding at the end of the period	$ 91,027		91,027		$ 97,406
Exercisable at the end of the period	62,094		62,094
Total intrinsic value of options exercised	13,000	$ 3,800	21,600	$ 12,700
Unrecognized Stock-based Compensation Expense
Total unrecognized stock-based compensation expenses related to unvested stock options, restricted shares and restricted share units	12,700		$ 12,700
Expected weighted average period for recognition of compensation expense related to unvested stock option			2 years 4 months 24 days
Restricted stock
Unrecognized Stock-based Compensation Expense
Total unrecognized stock-based compensation expenses related to unvested stock options, restricted shares and restricted share units	$ 41,800		$ 41,800
Expected weighted average period for recognition of compensation expense related to unvested stock option			3 years 1 month 6 days
Restricted Shares and Restricted Share Units
Outstanding at the beginning of the period (in shares)			1,820
Granted (in shares)			307
Vested (in shares)			(233)
Forfeited (in shares)			(66)
Outstanding at the end of the period (in shares)	1,828		1,828		1,820
Fair value of shares vested	$ 600	$ 100	$ 6,300	$ 3,800
Weighted Average Fair Value
Outstanding at the beginning of the period (in dollars per share)			$ 37.12
Granted (in dollars per share)	$ 48.80	$ 48.19	48.49
Vested (in dollars per share)			27.09
Forfeited (in dollars per share)			36.35
Outstanding at the end of the period (in dollars per share)	$ 40.34		$ 40.34		$ 37.12