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v2.4.1.9

Summary of Significant Accounting Policies (Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 27, 2014 | Dec. 28, 2013
Finite-Lived Intangible Assets [Line Items] |  |
Gross | 7,132 us-gaap_FiniteLivedIntangibleAssetsGross | $ 5,653 us-gaap_FiniteLivedIntangibleAssetsGross
Accumulated Amortization | 2,428 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization | 2,306 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Net | 4,704 us-gaap_FiniteLivedIntangibleAssetsNet | 3,347 us-gaap_FiniteLivedIntangibleAssetsNet
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months | 189 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths |
Finite-Lived Intangible Assets, Amortization Expense, Year Two | 189 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo |
Finite-Lived Intangible Assets, Amortization Expense, Year Three | 189 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree |
Finite-Lived Intangible Assets, Amortization Expense, Year Four | 189 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour |
Finite-Lived Intangible Assets, Amortization Expense, Year Five | 189 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive |
Lease Acquisitions [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross | 3,654 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LeasesAcquiredInPlaceMember | 3,654 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LeasesAcquiredInPlaceMember
Accumulated Amortization | 2,418 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LeasesAcquiredInPlaceMember | 2,235 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LeasesAcquiredInPlaceMember
Net | 1,236 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LeasesAcquiredInPlaceMember | 1,419 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LeasesAcquiredInPlaceMember
Liquor Licenses [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross | 3,358 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = wmk_LiquorLicensesMember | 1,879 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = wmk_LiquorLicensesMember
Accumulated Amortization | 0 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = wmk_LiquorLicensesMember | 65 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = wmk_LiquorLicensesMember
Net | 3,358 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = wmk_LiquorLicensesMember | 1,814 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = wmk_LiquorLicensesMember
Customer Lists [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross | 120 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerListsMember | 120 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerListsMember
Accumulated Amortization | 10 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerListsMember | 6 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerListsMember
Net | 110 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerListsMember | $ 114 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerListsMember
Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 30 years |
Minimum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 15 years |

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