Summary of Significant Accounting Policies - Summary of Net Sales Attributable to Various Segments (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Jan. 01, 2017	Oct. 02, 2016	Jul. 03, 2016	Apr. 03, 2016	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Operating Segment Information [Line Items]
Net sales	$ 242,889	$ 270,471	$ 243,671	$ 252,604	$ 266,283	$ 279,015	$ 241,409	$ 234,528	$ 1,009,635	$ 1,021,235	$ 1,029,098
Hard goods [Member]
Operating Segment Information [Line Items]
Net sales									509,618	529,869	534,864
Athletic and sport apparel [Member]
Operating Segment Information [Line Items]
Net sales									206,816	200,476	199,109
Athletic and sport footwear [Member]
Operating Segment Information [Line Items]
Net sales									288,536	287,399	291,325
Other sales [Member]
Operating Segment Information [Line Items]
Net sales									$ 4,665	$ 3,491	$ 3,800