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Investment in Leasing Operations: (Details 6) (USD $)
Mar. 28, 2015
Dec. 27, 2014
Investment in leasing operations    
0-60 Days Delinquent and Accruing $ 43,595,200wina_FinancingReceivableRecordedInvestment0To60DaysPastDue $ 44,136,800wina_FinancingReceivableRecordedInvestment0To60DaysPastDue
61-90 Days Delinquent and Accruing 5,000wina_FinancingReceivableRecordedInvestment61To90DaysPastDue  
Total investment in direct financing and sales-type leases 43,600,200wina_CapitalLeasesInvestmentInDirectFinancingAndSalesTypeLeasesGross 44,136,800wina_CapitalLeasesInvestmentInDirectFinancingAndSalesTypeLeasesGross
Middle-Market    
Investment in leasing operations    
0-60 Days Delinquent and Accruing 42,453,400wina_FinancingReceivableRecordedInvestment0To60DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= wina_MiddleMarketLeasesMember
42,948,000wina_FinancingReceivableRecordedInvestment0To60DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= wina_MiddleMarketLeasesMember
Total investment in direct financing and sales-type leases 42,453,400wina_CapitalLeasesInvestmentInDirectFinancingAndSalesTypeLeasesGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= wina_MiddleMarketLeasesMember
42,948,000wina_CapitalLeasesInvestmentInDirectFinancingAndSalesTypeLeasesGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= wina_MiddleMarketLeasesMember
Small-Ticket    
Investment in leasing operations    
0-60 Days Delinquent and Accruing 1,141,800wina_FinancingReceivableRecordedInvestment0To60DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= wina_SmallTicketLeasesMember
1,188,800wina_FinancingReceivableRecordedInvestment0To60DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= wina_SmallTicketLeasesMember
61-90 Days Delinquent and Accruing 5,000wina_FinancingReceivableRecordedInvestment61To90DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= wina_SmallTicketLeasesMember
 
Total investment in direct financing and sales-type leases $ 1,146,800wina_CapitalLeasesInvestmentInDirectFinancingAndSalesTypeLeasesGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= wina_SmallTicketLeasesMember
$ 1,188,800wina_CapitalLeasesInvestmentInDirectFinancingAndSalesTypeLeasesGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= wina_SmallTicketLeasesMember