Quarterly Financial Data Quarterly Financial Data (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
Jan. 03, 2015	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Revenues	$ 129,420us-gaap_Revenues	$ 196,510us-gaap_Revenues	$ 236,483us-gaap_Revenues	$ 113,338us-gaap_Revenues	$ 118,818us-gaap_Revenues	$ 193,362us-gaap_Revenues	$ 236,750us-gaap_Revenues	$ 114,244us-gaap_Revenues	$ 675,751us-gaap_Revenues	$ 663,174us-gaap_Revenues	$ 675,251us-gaap_Revenues
Gross Profit	27,600us-gaap_GrossProfit	58,386us-gaap_GrossProfit	82,278us-gaap_GrossProfit	24,923us-gaap_GrossProfit	21,390us-gaap_GrossProfit	57,679us-gaap_GrossProfit	87,263us-gaap_GrossProfit	25,314us-gaap_GrossProfit	193,187us-gaap_GrossProfit	191,646us-gaap_GrossProfit	207,518us-gaap_GrossProfit
Selling, General and Administrative Expense	46,487	48,512	49,715	44,041	40,612	44,177	49,612	41,502	188,755	175,903	182,220
Operating Income (Loss)	(18,887)us-gaap_OperatingIncomeLoss	9,874us-gaap_OperatingIncomeLoss	32,563us-gaap_OperatingIncomeLoss	(19,118)us-gaap_OperatingIncomeLoss	(19,222)us-gaap_OperatingIncomeLoss	13,502us-gaap_OperatingIncomeLoss	37,651us-gaap_OperatingIncomeLoss	(16,188)us-gaap_OperatingIncomeLoss	4,432us-gaap_OperatingIncomeLoss	15,743us-gaap_OperatingIncomeLoss	25,298us-gaap_OperatingIncomeLoss
Net Income (Loss) Attributable to Parent	$ (10,277)us-gaap_NetIncomeLoss	$ 4,936us-gaap_NetIncomeLoss	$ 18,304us-gaap_NetIncomeLoss	$ (11,015)us-gaap_NetIncomeLoss	$ (11,200)us-gaap_NetIncomeLoss	$ 6,524us-gaap_NetIncomeLoss	$ 22,242us-gaap_NetIncomeLoss	$ (9,729)us-gaap_NetIncomeLoss	$ 1,948us-gaap_NetIncomeLoss	$ 7,837us-gaap_NetIncomeLoss	$ 14,719us-gaap_NetIncomeLoss
Earnings Per Share, Basic	$ (0.42)us-gaap_EarningsPerShareBasic	$ 0.20us-gaap_EarningsPerShareBasic	$ 0.76us-gaap_EarningsPerShareBasic	$ (0.46)us-gaap_EarningsPerShareBasic	$ (0.46)us-gaap_EarningsPerShareBasic	$ 0.27us-gaap_EarningsPerShareBasic	$ 0.92us-gaap_EarningsPerShareBasic	$ (0.41)us-gaap_EarningsPerShareBasic	$ 0.08us-gaap_EarningsPerShareBasic	$ 0.32us-gaap_EarningsPerShareBasic	$ 0.63us-gaap_EarningsPerShareBasic
Earnings Per Share, Diluted	$ (0.42)us-gaap_EarningsPerShareDiluted	$ 0.20us-gaap_EarningsPerShareDiluted	$ 0.75us-gaap_EarningsPerShareDiluted	$ (0.46)us-gaap_EarningsPerShareDiluted	$ (0.46)us-gaap_EarningsPerShareDiluted	$ 0.26us-gaap_EarningsPerShareDiluted	$ 0.90us-gaap_EarningsPerShareDiluted	$ (0.41)us-gaap_EarningsPerShareDiluted	$ 0.08us-gaap_EarningsPerShareDiluted	$ 0.32us-gaap_EarningsPerShareDiluted	$ 0.62us-gaap_EarningsPerShareDiluted
Stock Trade Price, High	$ 12.92wmar_StockTradePriceHigh	$ 11.00wmar_StockTradePriceHigh	$ 11.70wmar_StockTradePriceHigh	$ 14.27wmar_StockTradePriceHigh	$ 14.23wmar_StockTradePriceHigh	$ 12.30wmar_StockTradePriceHigh	$ 12.43wmar_StockTradePriceHigh	$ 13.18wmar_StockTradePriceHigh
Stock Trade Price, Low	$ 8.74wmar_StockTradePriceLow	$ 8.46wmar_StockTradePriceLow	$ 9.91wmar_StockTradePriceLow	$ 11.09wmar_StockTradePriceLow	$ 11.25wmar_StockTradePriceLow	$ 10.58wmar_StockTradePriceLow	$ 11.00wmar_StockTradePriceLow	$ 10.61wmar_StockTradePriceLow

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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