Stock-Based Compensation - Weighted Average Fair Value (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 02, 2018	Oct. 03, 2017	Oct. 02, 2018	Oct. 03, 2017	Jan. 02, 2018
Stock Options
Stock option activity, Shares
Outstanding at beginning of year (in shares)			1,741
Granted (in shares)			381
Exercised (in shares)			(245)
Forfeited or cancelled (in shares)			(37)
Outstanding at end of year (in shares)	1,840		1,840		1,741
Exercisable at end of year (in shares)	1,051		1,051
Weighted Average Exercise Price
Outstanding at beginning of year (in dollars per share)			$ 42.25
Granted (in dollars per share)			47.22
Exercised (in dollars per share)			29.97
Forfeited or cancelled (in dollars per share)			50.01
Outstanding at end of year (in dollars per share)	$ 44.70		44.70		$ 42.25
Exercisable at end of year (in dollars per share)	$ 40.48		$ 40.48
Weighted Average Remaining Contractual Term (In years)
Weighted Average Remaining Contractual Term (In years)			4 years 3 months 18 days		4 years
Exercisable at end of year (In years)			2 years 9 months 18 days
Aggregate Intrinsic Value
Outstanding at beginning of year			$ 14,766
Outstanding at end of year	$ 15,200		15,200		$ 14,766
Exercisable at end of year	12,533		12,533
Total intrinsic value of options exercised	800	$ 400	5,500	$ 10,400
Unrecognized Stock-based Compensation Expense
Total unrecognized stock-based compensation expenses related to unvested stock options, restricted shares and restricted share units	$ 7,700		$ 7,700
Expected weighted average period for recognition of compensation expense related to unvested stock option			3 years 3 months 18 days
Restricted Shares and Restricted Share Units
Restricted Shares and Restricted Share Units, Shares
Outstanding at beginning of year (in shares)			1,694
Granted (in shares)			444
Vested (in shares)			(356)
Forfeited (in shares)			(116)
Outstanding at end of year (in shares)	1,666		1,666		1,694
Fair value of shares vested	$ 3,000	$ 2,200	$ 14,800	$ 15,100
Weighted Average Fair Value
Outstanding at beginning of year (in dollars per share)			$ 46.38
Granted (in dollars per share)	$ 50.15	$ 42.03	48.02
Vested (in dollars per share)			41.57
Forfeited (in dollars per share)			46.17
Outstanding at end of year (in dollars per share)	$ 47.79		$ 47.79		$ 46.38
Unrecognized Stock-based Compensation Expense
Total unrecognized stock-based compensation expenses related to unvested stock options, restricted shares and restricted share units	$ 34,800		$ 34,800
Expected weighted average period for recognition of compensation expense related to unvested stock option			3 years