Employee Benefits - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jan. 01, 2017	Jan. 03, 2016	Dec. 28, 2014
Nonqualified Deferred Compensation Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of defer on compensation	40.00%
401(K) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans, general information	The Company has a retirement savings plan which qualifies under Internal Revenue Code Section 401(k). All employees of the Company who have completed 1,000 hours of service and are at least 21 years of age are eligible to participate in the plan.
Service period of employees to be eligible for participation under the retirement savings plan (in hours)	1000 hours
Plan requires to match elective deferrals, higher	100.00%
Employee's elective deferrals higher percentage	3.00%
Plan requires to match elective deferrals, lower	50.00%
Employee's elective deferrals lower percentage	2.00%
Contributions to the plan, value	$ 5.2	$ 4.6	$ 4.1
Employee Stock Purchase Discount Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions to the plan, value	$ 0.5	$ 0.4	$ 0.3
Percentage of wages deduction from eligible employees	15.00%
Percentage of face value on stock purchase	85.00%
Shares purchased on the open market	23,317	23,994	25,224
Weighted-average price of shares purchased on the open market	$ 131.74	$ 105.16	$ 74.89