Deferred Compensation Plan - Additional Information (Detail) (USD $)	12 Months Ended
	Jan. 02, 2015	Jan. 03, 2014	Dec. 28, 2012
Deferred Compensation, Excluding Share-based Payments and Retirement Benefits
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Trading securities	$ 43,848,000	$ 37,979,000
Deferred compensation plan vested amounts due	45,394,000	37,926,000
Change in market value of trust assets	$ 2,525,000	$ 6,044,000	$ 2,158,000
Maximum
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Percentage of compensation deferred	100.00%