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Share-Based Compensation Manager Share Appreciation Plan (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Jan. 03, 2015
Dec. 28, 2013
Dec. 29, 2012
Dec. 31, 2011
Schedule of Manager Stock Appreciation Plan [Line Items]        
MSAP compendation expense COS $ 33wmar_MSAPcompendationexpenseCOS $ 18wmar_MSAPcompendationexpenseCOS $ 4wmar_MSAPcompendationexpenseCOS  
MSAP compensation SG&A 388wmar_MSAPcompensationSGA 77wmar_MSAPcompensationSGA 48wmar_MSAPcompensationSGA  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 0.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 4.08us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 4.28us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue  
Restricted Stock Awards, Granted, Weighted Average Grant Date Fair Value     $ 0.00wmar_RestrictedStockAwardsGrantedWeightedAverageGrantDateFairValue  
Manager Share Appreciation Plan Award, Fair Value Assumptions, Expected Volatility Rate   34.00%wmar_ManagerShareAppreciationPlanAwardFairValueAssumptionsExpectedVolatilityRate 45.00%wmar_ManagerShareAppreciationPlanAwardFairValueAssumptionsExpectedVolatilityRate  
Manager Share Appreciation Plan Award, Nonvested, Weighted Average Fair Value Price $ 2.04wmar_ManagerShareAppreciationPlanAwardNonvestedWeightedAverageFairValuePrice $ 2.59wmar_ManagerShareAppreciationPlanAwardNonvestedWeightedAverageFairValuePrice $ 2.04wmar_ManagerShareAppreciationPlanAwardNonvestedWeightedAverageFairValuePrice  
Share-based Compensation, Manager Share Appreciation Plan, Fair Value Assumptions, Risk Free Interest Rate   1.40%wmar_ShareBasedCompensationManagerShareAppreciationPlanFairValueAssumptionsRiskFreeInterestRate 0.60%wmar_ShareBasedCompensationManagerShareAppreciationPlanFairValueAssumptionsRiskFreeInterestRate  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term   4 years 6 months 4 years 6 months  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate   0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate  
Stock Issued During Period, Grants, Manager Share Appreciation Plan Awards 244,750wmar_StockIssuedDuringPeriodGrantsManagerShareAppreciationPlanAwards 163,125wmar_StockIssuedDuringPeriodGrantsManagerShareAppreciationPlanAwards 162,125wmar_StockIssuedDuringPeriodGrantsManagerShareAppreciationPlanAwards  
Number of Shares Related to Manager Share Appreciation Plan Awards, Vested (78,911)wmar_NumberofSharesRelatedtoManagerShareAppreciationPlanAwardsVested (43,230)wmar_NumberofSharesRelatedtoManagerShareAppreciationPlanAwardsVested 0wmar_NumberofSharesRelatedtoManagerShareAppreciationPlanAwardsVested  
Number of Shares Related to Manager Share Appreciation Plan Awards, Forfeited (73,250)wmar_NumberofSharesRelatedtoManagerShareAppreciationPlanAwardsForfeited (30,875)wmar_NumberofSharesRelatedtoManagerShareAppreciationPlanAwardsForfeited (13,375)wmar_NumberofSharesRelatedtoManagerShareAppreciationPlanAwardsForfeited  
Manager Share Appreciation Plan Grants Unvested, Number 330,359wmar_ManagerShareAppreciationPlanGrantsUnvestedNumber 237,770wmar_ManagerShareAppreciationPlanGrantsUnvestedNumber 148,750wmar_ManagerShareAppreciationPlanGrantsUnvestedNumber 0wmar_ManagerShareAppreciationPlanGrantsUnvestedNumber
Manager Share Appreciation Plan Compensation 421wmar_ManagerShareAppreciationPlanCompensation 95wmar_ManagerShareAppreciationPlanCompensation 52wmar_ManagerShareAppreciationPlanCompensation  
Manager Share Appreciation Plan, Liabilities $ 549wmar_ManagerShareAppreciationPlanLiabilities $ 100wmar_ManagerShareAppreciationPlanLiabilities $ 100wmar_ManagerShareAppreciationPlanLiabilities  
Manager Stock Appreciation Plan [Member]        
Schedule of Manager Stock Appreciation Plan [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 4 years 1 month 6 days 4 years 2 months 12 days 4 years 2 months 12 days  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_StatementScenarioAxis
= wmar_ManagerStockAppreciationPlanMember		 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_StatementScenarioAxis
= wmar_ManagerStockAppreciationPlanMember		 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_StatementScenarioAxis
= wmar_ManagerStockAppreciationPlanMember		  
Minimum [Member]        
Schedule of Manager Stock Appreciation Plan [Line Items]        
Manager Share Appreciation Plan Award, Fair Value Assumptions, Expected Volatility Rate 34.00%wmar_ManagerShareAppreciationPlanAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		      
Share-based Compensation, Manager Share Appreciation Plan, Fair Value Assumptions, Risk Free Interest Rate 0.80%wmar_ShareBasedCompensationManagerShareAppreciationPlanFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		      
Maximum [Member]        
Schedule of Manager Stock Appreciation Plan [Line Items]        
Manager Share Appreciation Plan Award, Fair Value Assumptions, Expected Volatility Rate 37.00%wmar_ManagerShareAppreciationPlanAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		      
Share-based Compensation, Manager Share Appreciation Plan, Fair Value Assumptions, Risk Free Interest Rate 1.40%wmar_ShareBasedCompensationManagerShareAppreciationPlanFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember