Summary of Significant Accounting Policies Inventories (Details) (USD $) In Millions, unless otherwise specified	Jan. 03, 2015	Dec. 28, 2013
Accounting Policies [Abstract]
Capitalized Indirect Costs	$ 19.9wmar_CapitalizedIndirectCosts	$ 18.9wmar_CapitalizedIndirectCosts
Inventory Valuation Reserves	(2.2)us-gaap_InventoryValuationReserves	(2.4)us-gaap_InventoryValuationReserves
Inventory, Reserve for Estimated Inventory Market Value Below Cost	$ (3.5)	$ (3.0)

Amount of valuation reserve for inventory.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant