Summary of Significant Accounting Policies Business (Details)	12 Months Ended
	Jan. 02, 2016 stores	Jan. 03, 2015	Dec. 28, 2013
Entity Location [Line Items]
Number of Stores	263
Number of States in which Entity Operates	38
Merchandise product categories	100.00%	100.00%	100.00%
Core Boating Products [Member]
Entity Location [Line Items]
Merchandise product categories	79.20%	81.30%	83.50%
Merchandise Expansion Products [Member]
Entity Location [Line Items]
Merchandise product categories	20.80%	18.70%	16.50%