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Investment in Leasing Operations: (Details 2) (Total assets)
 3 Months Ended
Mar. 28, 2015
item
Investment in leasing operations  
Number of customers 3wina_ConcentrationRiskNumberOfCustomers
Customer one concentration risk for leased assets
  
Investment in leasing operations  
Percentage of concentration risk 15.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AssetsTotalMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
Customer Two Concentration Risk
  
Investment in leasing operations  
Percentage of concentration risk 13.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AssetsTotalMember
/ us-gaap_ConcentrationRiskByTypeAxis
= wina_CustomerTwoConcentrationRiskMember
Customer Three Concentration Risk Member
  
Investment in leasing operations  
Percentage of concentration risk 16.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AssetsTotalMember
/ us-gaap_ConcentrationRiskByTypeAxis
= wina_CustomerThreeConcentrationRiskMember