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Shareholders' Equity: (Details) (USD $) | 12 Months Ended
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Dec. 27, 2014 | Dec. 28, 2013 | Dec. 29, 2012
Repurchase of Common Stock |  |  |
Aggregate purchase price of shares repurchased (in dollars) | $ 11,564,800 us-gaap_StockRepurchasedAndRetiredDuringPeriodValue | $ 1,854,900 us-gaap_StockRepurchasedAndRetiredDuringPeriodValue | $ 7,220,300 us-gaap_StockRepurchasedAndRetiredDuringPeriodValue
Dividends |  |  |
Cash dividend approved by Board of Directors (in dollars per share) | $ 0.23 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.19 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.15 us-gaap_CommonStockDividendsPerShareDeclared
Special cash dividend approved by Board of Directors (in dollars per share) | $ 5.00 wina_CommonStockSpecialCashDividendsPerShareDeclared |  | $ 5.00 wina_CommonStockSpecialCashDividendsPerShareDeclared
Total special dividend in cash | 25,800,000 wina_SpecialDividendsCommonStockCash |  | 25,400,000 wina_SpecialDividendsCommonStockCash
Borrowings on line of credit for special dividend | 13,000,000 wina_LineOfCreditFacilityIncreaseAdditionalBorrowing |  | 12,800,000 wina_LineOfCreditFacilityIncreaseAdditionalBorrowing
Aggregate quarterly cash dividends declared and paid | 1,200,000 wina_DividendsCommonStockCashExcludingSpecialDividends | 960,000 wina_DividendsCommonStockCashExcludingSpecialDividends | 750,000 wina_DividendsCommonStockCashExcludingSpecialDividends
Common Stock Repurchase Program |  |  |
Repurchase of Common Stock |  |  |
Number of shares repurchased | 166,030 us-gaap_StockRepurchasedAndRetiredDuringPeriodShares / us-gaap_ShareRepurchaseProgramAxis = wina_CommonStockRepurchaseProgramMember | 28,422 us-gaap_StockRepurchasedAndRetiredDuringPeriodShares / us-gaap_ShareRepurchaseProgramAxis = wina_CommonStockRepurchaseProgramMember | 134,720 us-gaap_StockRepurchasedAndRetiredDuringPeriodShares / us-gaap_ShareRepurchaseProgramAxis = wina_CommonStockRepurchaseProgramMember
Aggregate purchase price of shares repurchased (in dollars) | $ 11,600,000 us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / us-gaap_ShareRepurchaseProgramAxis = wina_CommonStockRepurchaseProgramMember | $ 1,900,000 us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / us-gaap_ShareRepurchaseProgramAxis = wina_CommonStockRepurchaseProgramMember | $ 7,200,000 us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / us-gaap_ShareRepurchaseProgramAxis = wina_CommonStockRepurchaseProgramMember
Aggregate purchase price per share of shares repurchased (in dollars per share) | $ 69.65 wina_ShareRepurchasedAndRetiredPricePaidPerShare / us-gaap_ShareRepurchaseProgramAxis = wina_CommonStockRepurchaseProgramMember | $ 65.26 wina_ShareRepurchasedAndRetiredPricePaidPerShare / us-gaap_ShareRepurchaseProgramAxis = wina_CommonStockRepurchaseProgramMember | $ 53.60 wina_ShareRepurchasedAndRetiredPricePaidPerShare / us-gaap_ShareRepurchaseProgramAxis = wina_CommonStockRepurchaseProgramMember
Number of additional shares that can be repurchased | 166,700 us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased / us-gaap_ShareRepurchaseProgramAxis = wina_CommonStockRepurchaseProgramMember |  |

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Number of shares that have been repurchased and retired during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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