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Basis of Presentation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 04, 2015	Mar. 29, 2014	Jan. 03, 2015	Dec. 28, 2013
Schedule of Merchandise Product Categories [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 6,637	$ 10,436	$ 45,675	$ 48,408
Merchandise product categories	100.00%wmar_Merchandiseproductcategories	100.00%wmar_Merchandiseproductcategories
Core Boating Products [Member]
Schedule of Merchandise Product Categories [Line Items]
Merchandise product categories	81.20%	82.80%
Merchandise Expansion Products [Member]
Schedule of Merchandise Product Categories [Line Items]
Merchandise product categories	18.80%	17.20%

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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