Equity Components [Axis] Capital in Excess of Par Value [Member] Retained Earnings [Member] Accumulated Other Comprehensive Loss [Member] Segments [Axis] Frozen Food Products [Member] Snack Food Products [Member] Other [Member] Common Stock [Member] Concentration Risk Benchmark [Axis] Sales Revenue, Net [Member] Customer [Axis] Wal-Mart [Member] Accounts Receivable [Member] Property, Plant and Equipment, Type [Axis] Building and Building Improvements [Member] Range [Axis] Minimum [Member] Maximum [Member] Machinery and Equipment [Member] Transportation Equipment [Member] Dollar General [Member] Product and Service [Axis] Shipping and Handling Costs [Member] Promotional Allowances [Member] Type of Arrangement and Non-arrangement Transactions [Axis] Master Collateral Loan And Security Agreement [Member] Legal Entity [Axis] Wells Fargo Bank, N.A. [Member] Report Date [Axis] December 26, 2018 [Member] Defined Benefit Plan, Asset Categories [Axis] Large Cap Equities [Member] Mid Cap Equities [Member] International (Equities Only) [Member] Fixed Income [Member] Other (Government/Corporate, Bonds) [Member] Cash [Member] Small Cap Equities [Member] Fair Value, Hierarchy [Axis] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Retirement Plan Type [Axis] Pension Plan [Member] Executive Post-retirement Benefits [Member] Post-retirement Healthcare Benefits [Member] One Percent Increase in Healthcare Cost Trend Rate [Member] One Percent Decrease In Healthcare Cost Trend Rate [Member] Postretirement Health Coverage [Member] Plan Name [Axis] Executive Retirement Plans [Member] Deferred Bonus and Profit Sharing Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] Plan Type, 401K [Member] Non-qualified Supplemental Executive Retirement Plan [Member] Fiscal 2019 [Member] Fiscal 2020 [Member] Fiscal 2021 [Member] Fiscal 2022 [Member] Fiscal 2023 [Member] Income Tax Authority [Axis] State and Local Jurisdiction [Member] Tax Period [Axis] Earliest Tax Year [Member] Latest Tax Year [Member] Credit Facility [Axis] Revolving Credit Facility [Member] Variable Rate [Axis] London Interbank Offered Rate (LIBOR) [Member] Scenario [Axis] Fiscal Year 2019 [Member] Fiscal Year 2018 [Member] Document And Entity Information Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity a Well-known Seasoned Issuer Entity a Voluntary Filer Entity's Reporting Status Current Entity Filer Category Entity Small Business Flag Entity Emerging Growth Company Entity Ex Transition Period Entity Shell Company Entity Public Float Entity Common Stock, Shares Outstanding Trading Symbol Document Fiscal Period Focus Document Fiscal Year Focus Statement of Financial Position [Abstract] ASSETS Current assets: Cash and cash equivalents Accounts receivable, less allowance for doubtful accounts of $33 and $30, respectively and promotional allowances of $2,122 and $2,537, respectively Inventories, net Prepaid expenses Total current assets Property, plant and equipment, net of accumulated depreciation and amortization of $66,337 and $63,722, respectively Other non-current assets Deferred income taxes Total assets LIABILITIES AND SHAREHOLDERS' EQUITY Current liabilities: Accounts payable Accrued payroll, advertising and other expenses Income taxes payable Current portion of non-current liabilities Total current liabilities Non-current liabilities Total liabilities Contingencies and commitments (Notes 3, 5 and 6) Shareholders' equity: Preferred stock, without par value; Authorized, - 1,000 shares; issued and outstanding - none Common stock, $1.00 par value; Authorized, - 20,000 shares; issued and outstanding - 9,076 and 9,076 Capital in excess of par value Retained earnings Accumulated other comprehensive loss Total shareholders' equity Total liabilities and shareholders' equity Accounts receivable, allowance for doubtful accounts Accounts receivable, allowance for promotional allowances Property, plant and equipment, accumulated depreciation Preferred stock, par value Preferred stock, shares authorized Preferred stock, shares issued Preferred stock, shares outstanding Common stock, par value Common stock, shares authorized Common stock, shares issued Common stock, shares outstanding Income Statement [Abstract] Net sales Cost of products sold Gross margin Selling, general and administrative expenses Gain on sale of property, plant and equipment Income before taxes Provision for income taxes Net income Basic earnings per share Shares used to compute basic earnings per share Net income Other comprehensive income from defined benefit plans Other postretirement benefit plans: Actuarial gain Prior service (benefit) Other comprehensive income from other postretirement benefit plans, net Other comprehensive income, before taxes Tax expense on other comprehensive income Change in other comprehensive income, net of tax Comprehensive income, net of tax Statement [Table] Statement [Line Items] Balance Balance, shares ASU 2018-02 (Note 1) Net change in defined benefit plans and other benefit plans Balance Balance, shares Statement of Cash Flows [Abstract] Cash flows from operating activities: Adjustments to reconcile net income to net cash provided by operating activities: Depreciation Provision for losses on accounts receivable Provision for reduction in promotional allowances Loss gain on sale of property, plant and equipment Deferred income taxes, net Tax valuation allowance Changes in operating assets and liabilities: Accounts receivable Inventories Prepaid expenses Refundable income taxes Other non-current assets Accounts payable Accrued payroll, advertising and other expenses Income taxes payable Current portion of non-current liabilities Non-current liabilities Net cash provided by operating activities Cash used in investing activities: Proceeds from sale of property, plant and equipment Additions to property, plant and equipment Net cash used in investing activities Cash used in financing activities: Payment of capital lease obligations Net cash used in financing activities Net (decrease) increase in cash and cash equivalents Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Supplemental disclosure of cash flow information: Cash paid for income taxes Accounting Policies [Abstract] The Company and Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements [Abstract] Composition of Certain Financial Statement Captions Retirement Benefits [Abstract] Retirement and Other Benefit Plans Income Tax Disclosure [Abstract] Income Taxes Debt Disclosure [Abstract] Line of Credit and Borrowing Agreement Commitments and Contingencies Disclosure [Abstract] Contingencies and Commitments Segment Reporting [Abstract] Segment Information Quarterly Financial Information Disclosure [Abstract] Unaudited Interim Financial Information Use of Estimates and Assumptions Subsequent Events Concentrations of Credit Risk Business Segments Fiscal Year Revenues Advertising Expenses Cash and Cash Equivalents Fair Value Measurements Inventories Property, Plant and Equipment Capital Leases Life Insurance Policies Income Taxes Stock-based Compensation Comprehensive Income or Loss Recently Issued Accounting Pronouncements and Regulations Schedule of Composition of Certain Financial Statement Schedule of Net Pension Cost Schedule of Assumptions Used Schedule of Changes in Projected Benefit Obligations Schedule of Allocation of Plan Assets Fair Value of Pension Plan Assets Schedule of Expected Payments for Pension Benefits Net Periodic Post-retirement Healthcare (benefit) Cost Schedule of Health Care Cost Trend Rates Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates Schedule of Net Funded Status Schedule of Provision (Benefit) for Taxes on Income Schedule of Tax Provision Differs from Statutory Federal Income Tax Rate Schedule of Deferred Income Taxes Results from Differences in Bases of Assets and Liabilities Schedule of Reconciliation of Unrecognized Tax Benefits Schedule of Segment Reporting Information, by Segment Line of credit facility, maximum borrowing capacity Proceeds from loan borrowed Fixed rate Loan term Financial convenants, decsription Liabilities to tangible net worth ratio Quick ratio Financial covenants net income after tax, minimum Concentration risk, percentage Number of reportable segments Cost Incured Advertising expense Cash equivalents, at carrying value Property, plant and equipment, useful life Disclosure Text Block Supplement [Abstract] Meat, ingredients and supplies Work in process Finished goods Inventories, net Land Buildings and improvements Machinery and equipment Capital leased trucks Transportation equipment Construction in process Property, plant and equipment, gross Accumulated depreciation and amortization Property, plant and equipment, net Cash surrender value benefits Other Other non-current assets Payroll, vacation, payroll taxes and employee benefits Accrued advertising and broker commissions Property taxes Other Accrued payroll, advertising and other expenses Defined benefit retirement plan Executive retirement plans Incentive compensation Capital lease obligation Customer deposits Postretirement healthcare benefits Current portion of non-current liabilities Defined benefit retirement plan Executive retirement plans Incentive compensation Postretirement healthcare benefits Non-current liabilities Estimated future employer contribution Expected long-term return on assets, percentage Percent added to seasoned bond rate Assumptions used calculating benefit obligation, rate of compensation increase Other postretirement benefits payable Cash surrender value of life insurance Deferred incentive compensation plan payment period Deferred compensation arrangement with individual, recorded liability Officers' compensation Changes in healthcare cost trend rate, description Defined benefit plan, contributions by employer Service cost Interest cost Expected return on plan assets Amortization of unrecognized loss Net pension cost Discount rate Rate of increase in salary levels Expected return on plan assets Fair value of plan assets - beginning of year Employer contributions Actual return on plan assets Benefits paid Fair value of plan assets - end of year Benefit obligations - beginning of year Actuarial gain Benefits paid Benefit obligations - end of year Funded status of the plans Unrecognized prior service costs Unrecognized net actuarial loss Net amount recognized Defined Benefit Plan, Plan Assets, Category [Axis] Actual Asset Allocation Target Asset Allocation Fair Value Hierarchy and NAV [Axis] Total plan assets 2019 2020 2021 2022 2023 2024-2028 Amortization of prior service cost Amortization of actuarial gain Net periodic postretirement healthcare (benefit) Medical trend rate next year Ultimate trend rate Year ultimate trend rate is achieved Interest cost plus service cost Accumulated postretirement healthcare obligation Unrecognized prior service costs Unrecognized net actuarial gain Unrecognized amounts recorded in other comprehensive income Postretirement healthcare liability 2023-2027 Valuation allowance Income tax rate reconciliation description Federal income tax rate Blended corporate tax rate before and after the Tax Act Adjustment to income tax provision Deferred tax assets, reclassified from other comprehensive income to retained earnings Net operating loss carryforwards Net operating loss carryforwards, expiration description Deferred tax liability not recognized, amount of unrecognized deferred tax liability, undistributed earnings of domestic subsidiaries Unrecognized tax benefits, income tax penalties and interest accrued State income tax returns, open to audit, years Federal State Current: Federal and State Tax Expense Benefit Federal State Deferred Federal and State Tax Expense Benefit Provision (benefit) for income taxes Provision for federal income taxes at the applicable statutory rate Increase in provision resulting from state income taxes, net of federal income tax benefit Change in federal rate - Tax Act Non-taxable life insurance gain Domestic Production Activities Deduction Change in valuation allowance Other, net Receivables allowance Returns allowance Inventory packaging reserve Inventory overhead capitalization Employee benefits Other State taxes Incentive compensation Pension and health care benefits Depreciation Net operating loss carry-forward and credits Valuation allowance established against state NOL Non-current tax assets, net Balance at beginning of year Additions based on tax positions related to the current year Additions for tax positions of prior years Reductions for tax positions of prior years Settlements Balance at end of year Line of credit expiration date Long-term Line of Credit Line of Credit Facility, Maximum Borrowing Capacity Debt Instrument, Basis Spread on Variable Rate Debt Covenant, Maximum Allowable Capital Expenditures Proceeds from loan Line of credit facility, current borrowing capacity Repayments of capital lease obligations Number of operating segments Net Sales Cost of products sold Gross margin SG&A Gain on sale of property , plant and equipment Income before taxes Total assets Additions to PP&E A provision (charged as a reduction of revenue) to relate the costs of certain customer discounts and rewards for the associated revenue. Accruals for trade and sales promotions are recorded primarily at the time a product is sold to the customer based on expected levels of performance. Settlement of these liabilitites typically occur in subsequent periods. Capital in Excess of Par Value [Member] Deferred Tax [Member] Fiscal Year 2018 [Member] Frozen Food Products [Member] November 02, 2018 [Member] Reclassification upon early adoption of accounting standards. Reduced Federal Tax Rate [Member] Smokehouses and Chillers [Member] Snack Food Products [Member] Thereafter [Member] Wal-Mart [Member] Dollar General [Member] Other postretirement benefit plans [abstract] Pretax change in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan, that has not been recognized in net periodic benefit cost for other post retirement plans. Amount before tax, after reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans, attributable to parent entity. Promotional Allowances [Member] December 26, 2018 [Member] Represents transportation equipment. Amortization of unrecognized loss. Unrecognized prior service costs. Unrecognized net actuarial loss. Represents large cap equities. Represents mid-cap equities. International (Equities Only) [Member] Represents fixed income securities. Represents other government corporate bonds. Represents small cap equities. Pension Plan [Member] Executive Post-retirement Benefits [Member] Post-retirement Healthcare Benefits [Member] One Percent Increase in Healthcare Cost Trend Rate [Member] One Percent Decrease In Healthcare Cost Trend Rate [Member] Executive Retirement Plans [Member] Fiscal 2018 [Member] Supplemental Executive Retirement Plan [Member] Fiscal 2019 [Member] Fiscal 2020 [Member] Fiscal 2021 [Member] Fiscal 2022 [Member] Represents the 401K plan. Represents the percent added to seasoned bond rate Represents the deferred incentive compensation plan payment period Fiscal 2023 [Member] Net operating loss carryforwards, expiration description. Liabilities to tangible net worth ratio. Quick ratio. Financial covenants net income after tax, minimum. The maximum allowable amount of capital expenditures as part of a debt covenant. Tabular presentation of the fair value of pension plan assets and the level under which fair values were determined. Represents net periodic post-retirement healthcare cost.. Fiscal Year 2019 [Member] Non-qualified Supplemental Executive Retirement Plan [Member] Wells Fargo Bank, N.A. [Member] Master Collateral Loan And Security Agreement [Member] Provision for reduction in promotional allowances. Assets, Current Liabilities, Current Liabilities Stockholders' Equity Attributable to Parent Liabilities and Equity Gain (Loss) on Disposition of Other Assets OtherComprehensiveIncomeOtherPostRetirementPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax OtherComprehensiveIncomeOtherPostRetirementPlansAdjustmentBeforeTaxPortionAttributableToParent Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Other Comprehensive Income, Other, Net of Tax Shares, Issued Gain (Loss) on Disposition of Property Plant Equipment Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Increase (Decrease) in Accounts Receivable Increase (Decrease) in Inventories Increase (Decrease) in Prepaid Expense Increase (Decrease) in Income Taxes Receivable Increase (Decrease) in Other Noncurrent Assets Increase (Decrease) in Accounts Payable Increase (Decrease) in Accrued Liabilities Increase (Decrease) in Income Taxes Payable Increase (Decrease) in Other Accrued Liabilities Increase (Decrease) in Other Noncurrent Liabilities Net Cash Provided by (Used in) Operating Activities Payments to Acquire Property, Plant, and Equipment Net Cash Provided by (Used in) Investing Activities Repayments of Long-term Capital Lease Obligations Net Cash Provided by (Used in) Financing Activities Cash and Cash Equivalents, Period Increase (Decrease) Income Tax, Policy [Policy Text Block] Property, Plant and Equipment, Gross Other Accrued Liabilities, Current Liability, Defined Benefit Pension Plan, Noncurrent Liability, Defined Benefit Plan, Noncurrent Deferred Compensation Cash-based Arrangements, Liability, Classified, Noncurrent Liability, Pension and Other Postretirement and Postemployment Benefits, Noncurrent Defined Benefit Plan, Expected Return (Loss) on Plan Assets Defined Benefit Plan, Benefit Obligation, Benefits Paid Defined Benefit Plan, Benefit Obligation Defined Benefit Plan, Plan Assets, Benefits Paid Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Defined Benefit Plan, Amortization of Gain (Loss) Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax Current Federal, State and Local, Tax Expense (Benefit) Deferred Federal Income Tax Expense (Benefit) Deferred State and Local Income Tax Expense (Benefit) Deferred Federal, State and Local, Tax Expense (Benefit) Effective Income Tax Rate Reconciliation, Nondeductible Expense, Life Insurance, Amount Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount Deferred Tax Assets, Other Deferred Tax Assets, State Taxes Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Bonuses Deferred Tax Assets, Property, Plant and Equipment Deferred Tax Assets, Valuation Allowance Unrecognized Tax Benefits Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Cost of Revenue