Weis Markets (WMK) 10-K 12 Mar 20 2019 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 28, 2019	Mar. 12, 2020	Jun. 29, 2019
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 28, 2019
Document Transition Report	false
Entity File Number	1-5039
Entity Registrant Name	WEIS MARKETS INC
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	24-0755415
Entity Address, Address Line One	1000 S. Second Street
Entity Address, Address Line Two	P. O. Box 471
Entity Address, City or Town	Sunbury
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	17801-0471
City Area Code	570
Local Phone Number	286-4571
Title of 12(b) Security	Common stock, no par value
Trading Symbol	WMK
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 368,000,000
Entity Common Stock, Shares Outstanding		26,898,443
Documents Incorporated by Reference [Text Block]	DOCUMENTS INCORPORATED BY REFERENCE: Selected portions of the Weis Markets, Inc. definitive proxy statement dated March 12, 2020 are incorporated by reference in Part III of this Form 10-K.
Amendment Flag	false
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2019
Entity Central Index Key	0000105418
Current Fiscal Year End Date	--12-28

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Current:
Cash and cash equivalents	$ 66,871	$ 37,808
Marketable securities	63,538	54,298
SERP investment	18,935	14,686
Accounts receivable, net	55,764	57,285
Inventories	279,806	280,756
Prepaid expenses and other current assets	23,378	24,289
Total current assets	508,292	469,122
Property and equipment, net	886,928	887,608
Operating lease right-to-use	210,196	0
Goodwill	52,330	52,330
Intangible and other assets, net	17,816	22,951
Total assets	1,675,562	1,432,011
Current:
Accounts payable	180,718	191,099
Accrued expenses	39,528	45,354
Operating leases	39,114	0
Accrued self-insurance	15,719	15,516
Deferred revenue, net	8,662	7,961
Income taxes payable	8,197	7,283
Total current liabilities	291,938	267,213
Postretirement benefit obligations	22,143	18,110
Accrued self-insurance	17,625	17,795
Operating leases	179,654	0
Deferred income taxes	97,041	90,793
Other	8,416	15,201
Total liabilities	616,817	409,112
Shareholders' Equity
Common stock, no par value, 100,800,000 shares authorized, 33,047,807 shares issued, 26,898,443 shares outstanding	9,949	9,949
Retained earnings	1,198,173	1,163,545
Accumulated other comprehensive income (Net of deferred taxes of $593 in 2019 and $110 in 2018)	1,480	262
Shareholders' equity before treasury stock	1,209,602	1,173,756
Treasury stock at cost, 6,149,364 shares	(150,857)	(150,857)
Total shareholders' equity	1,058,745	1,022,899
Total liabilities and shareholders' equity	$ 1,675,562	$ 1,432,011

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Consolidated Balance Sheets [Abstract]
Common stock, par value
Common stock, shares authorized	100,800,000	100,800,000
Common stock, shares issued	33,047,807	33,047,807
Common stock, shares outstanding	26,898,443	26,898,443
Accumulated other comprehensive income, deferred taxes	$ 593	$ 110
Treasury stock, shares	6,149,364	6,149,364

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Consolidated Statements of Income [Abstract]
Net sales	$ 3,543,299	$ 3,509,270	$ 3,466,807
Cost of sales, including advertising, warehousing and distribution expenses	2,605,105	2,574,269	2,554,284
Gross profit on sales	938,194	935,001	912,523
Operating, general and administrative expenses	853,555	852,330	834,004
Income from operations	84,639	82,671	78,519
Investment income (loss) and interest expense	7,054	(1,454)	2,598
Other income (expense)	(3,049)	919	(2,094)
Income before provision for income taxes	88,644	82,136	79,023
Provision for income taxes	20,661	19,398	(19,391)
Net income	$ 67,983	$ 62,738	$ 98,414
Weighted-average shares outstanding, basic and diluted	26,898,443	26,898,443	26,898,443
Cash dividends per share	$ 1.24	$ 1.21	$ 1.20
Basic and diluted earnings per share	$ 2.53	$ 2.33	$ 3.66

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 67,983	$ 62,738	$ 98,414
Available-for-sale marketable securities
Unrealized holding gains (losses) arising during period (Net of deferred taxes of $498, $62 and $19, respectively)	1,255	(177)	(43)
Accumulated change in effective tax rate			1,042
Reclassification adjustment for (gains) losses included in net income (Net of deferred taxes of $14, $14 and $11, respectively)	(37)	40	29
Other comprehensive income (loss), net of tax	1,218	(137)	1,028
Comprehensive income, net of tax	$ 69,201	$ 62,601	$ 99,442

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Consolidated Statements of Comprehensive Income [Abstract]
Unrealized holding gains (losses) arising during period, deferred taxes	$ 498	$ 62	$ 19
Reclassification adjustment for (gains) losses included in net income, deferred taxes	$ 14	$ 14	$ 11

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
Balance, at Dec. 31, 2016	$ 9,949	$ 1,062,778	$ 4,852	$ (150,857)	$ 926,722
Balance, shares at Dec. 31, 2016	33,047,807			6,149,364
Net income	$ 0	98,414	0	$ 0	98,414
Other comprehensive income (loss), net of reclassification adjustments and tax	0	0	(14)	0	(14)
Dividends paid	0	(32,278)	0	0	(32,278)
Balance, at Dec. 30, 2017	$ 9,949	1,127,872	5,880	$ (150,857)	992,844
Balance, shares at Dec. 30, 2017	33,047,807			6,149,364
Cumulative effect of accounting principle adoption	$ 0	(1,042)	1,042	$ 0	0
Net income	0	62,738	0	0	62,738
Other comprehensive income (loss), net of reclassification adjustments and tax	0	0	(137)	0	(137)
Dividends paid	0	(32,546)	0	0	(32,546)
Balance, at Dec. 29, 2018	$ 9,949	1,163,545	262	$ (150,857)	1,022,899
Balance, shares at Dec. 29, 2018	33,047,807			6,149,364
Cumulative effect of accounting principle adoption	$ 0	5,481	(5,481)	$ 0	0
Net income	0	67,983	0	0	67,983
Other comprehensive income (loss), net of reclassification adjustments and tax	0	0	1,218	0	1,218
Dividends paid	0	(33,354)	0	0	(33,354)
Balance, at Dec. 28, 2019	$ 9,949	$ 1,198,173	$ 1,480	$ (150,857)	$ 1,058,745
Balance, shares at Dec. 28, 2019	33,047,807			6,149,364

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Cash flows from operating activities:
Net income	$ 67,983	$ 62,738	$ 98,414
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	93,706	93,567	85,415
(Gain) Loss on disposition of fixed assets	782	1,274	(700)
Impairment of fixed assets	0	1,532	0
(Gain) Loss on sale of marketable securities	(51)	54	40
Unrealized (gain) loss in value of equity securities	(1,975)	1,606	0
Deferred income taxes	5,765	3,418	(31,993)
Unrealized (gain) loss in SERP	(135)	1,883	(1,114)
Changes in operating assets and liabilities:
Inventories	950	(1,247)	(2,726)
Accounts receivable and prepaid expenses	2,431	(5,874)	4,045
Accounts payable and other liabilities	(505)	(18,583)	7,742
Income taxes	913	9,330	(422)
Other	1,822	565	446
Net cash provided by operating activities	171,686	150,263	159,147
Cash flows from investing activities:
Purchase of property and equipment	(101,456)	(95,696)	(95,857)
Proceeds from the sale of property and equipment	4,245	1,734	2,246
Purchase of marketable securities	(13,620)	(5,627)	(12,612)
Proceeds from maturities of marketable securities	5,985	6,550	8,442
Proceeds from the sale of marketable securities	1,180	5,834	7,272
Purchase of intangible assets	(1,489)	(3,540)	(3,565)
Change in SERP investment	(4,114)	(2,093)	(2,208)
Net cash used in investing activities	(109,269)	(92,838)	(96,282)
Cash flows from financing activities:
Payments on long-term debt	0	(34,988)	(29,488)
Dividends paid	(33,354)	(32,546)	(32,278)
Net cash used in financing activities	(33,354)	(67,534)	(61,766)
Net increase (decrease) in cash and cash equivalents	29,063	(10,109)	1,099
Cash and cash equivalents at beginning of year	37,808	47,917	46,818
Cash and cash equivalents at end of period	$ 66,871	$ 37,808	$ 47,917

Consolidated Statements Of Ca_2

Consolidated Statements Of Cash Flows (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Consolidated Statements of Cash Flows [Abstract]
Income taxes paid	$ 14,100	$ 6,500	$ 13,000
Interest paid	$ 65	$ 383	$ 973

Summary Of Significant Accounti

Summary Of Significant Accounting Policies	12 Months Ended
	Dec. 28, 2019
Summary Of Significant Accounting Policies [Abstract]
Summary Of Significant Accounting Policies	Note 1 Summary of Significant Accounting Policies The following is a summary of the significant accounting policies utilized in preparing the Company’s Consolidated Financial Statements:  (a) Description of Business Weis Markets, Inc. is a Pennsylvania business corporation formed in 1924. The Company is engaged principally in the retail sale of food in Pennsylvania and surrounding states. The Company’s operations are reported as a single reportable segment. There was no material change in the nature of the Company's business during fiscal 2019 .  (b) Definition of Fiscal Year The Company’s fiscal year ends on the last Saturday in December. Fiscal 2019 was comprised of 52 weeks, ending on December 28, 2019 . Fiscal 2018 was comprised of 52 weeks, ending on December 29, 2018 . Fiscal 2017 was comprised of 52 weeks, ending on December 30, 2017 . References to years in this Annual Report relate to fiscal years.  (c) Principles of Consolidation The Consolidated Financial Statements include the accounts of the Company and its subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation.  (d) Use of Estimates Management of the Company has made a number of estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities to prepare these Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America. Actual results could differ from those estimates.  (e) Cash and Cash Equivalents The Company maintains its cash balances in the form of core checking accounts and money market accounts. The Company maintains cash deposits with banks that at times exceed applicable insurance limits. The Company reduces its exposure to credit risk by maintaining such deposits with high quality financial institutions that management believes are creditworthy.  The Company considers investments with an original maturity of three months or less to be cash equivalents. Investment amounts classified as cash equivalents as of December 28, 2019 and December 29, 2018 totaled $32.9 million and $5. 4 million , respectively.  Consumer electronic payments accepted at the point of sale, including all credit card, debit card and electronic benefits transfer transactions that process in three days or less are classified as cash equivalents. Consumer electronic payment amounts classified as cash equivalents as of December 28, 2019 and December 29, 2018 totaled $23.1 million and $23.6 million, respectively.  (f) Marketable Securities Marketable securities consist of municipal bonds and equity securities. The Company invests primarily in high-grade marketable debt securities. The Company classifies all of its marketable securities as available-for-sale.  Available-for-sale securities are recorded at fair value as determined by quoted market price based on national markets. Unrealized holding gains and losses, net of the related tax effect, on municipal bonds are excluded from earnings and are reported as a separate component of shareholders’ equity until realized. Unrealized holding gains and losses on equity securities are recorded in investment income (loss) and interest expense. A decline in the fair value below cost that is deemed other than temporary results in a charge to earnings and the establishment of a new cost basis for the security. Dividend and interest income is recognized when earned. Realized gains and losses are included in earnings and are derived using the specific identification method for determining the cost of securities.  Equity securities are measured at fair value and the unrealized holding gains and losses are recorded in investment income (loss) and interest expense. The Company recognized a $2.0 million gain in 2019 and a $1.6 million loss in 2018.  (g) Accounts Receivable Accounts receivable are stated net of an allowance for uncollectible accounts of $2.8 million and $2.1 million as of December 28, 2019 and December 29, 2018 , respectively. The reserve balance relates to amounts due from pharmacy third party providers, retail customer returned checks, manufacturing customers, vendors and tenants. The Company maintains an allowance for the amount of receivables deemed to be uncollectible and calculates this amount based upon historical collection activity adjusted for current conditions.  Note 1 Summary of Significant Accounting Policies (continued)  (h) Inventories Inventories are valued at the lower of cost or net realizable value, using both the retail inventory and average cost methods. The retail inventory method is commonly used by retail companies to determine cost and calculate gross margin based on applying a cost-to-retail ratio to each similar merchandise category’s ending retail value. The Company’s center store and pharmacy inventories are valued using last in, first out (LIFO). The Company’s fresh inventories are valued using average cost. The Company evaluates inventory shortages throughout the year based on actual physical counts in its facilities. Allowances for inventory shortages are recorded based on the results of these counts and to provide for estimated shortages from the last physical count to the financial statement date.  (i) Property and Equipment Property and equipment are recorded at cost. Depreciation is provided on the cost of buildings and improvements and equipment using the straight-line method.  Leasehold improvements are amortized using the straight-line method over the terms of the leases or the useful lives of the assets, whichever is shorter.  Maintenance and repairs are expensed and renewals and betterments are capitalized. When assets are retired or otherwise disposed of, the assets and accumulated depreciation are removed from the respective accounts and any profit or loss on the disposition is credited or charged to “Operating, general and administrative expenses.”  (j) Leases The Company leases approximately 52% of its open store facilities under operating leases that expire at various dates through 2035, with the remaining store facilities being owned. These leases generally provide for fixed annual rentals; however, several provide for minimum annual rentals plus variable lease costs related to real estate taxes and insurance as well as contingent rentals based on a percentage of annual sales or increases periodically based on inflation. These variable lease costs are not included in the measurement of the operating lease right-to-use assets or lease liabilities and are charged to the related expense category included in “Operating, general and administrative expenses.” Most of the leases contain multiple renewal options, under which the Company may extend the lease terms from 5 to 20 years. Additionally, the Company has operating leases for certain transportation and other equipment. The Company leases or subleases space to tenants in owned, vacated and open store facilities. Rental income is recorded when earned as a component of “Operating, general and administrative expenses.”  (k) Goodwill and Intangible Assets Goodwill is not amortized but tested for impairment on an annual basis and between annual tests when indicators of impairment are identified. Intangible assets with an indefinite useful life are not amortized until their useful life is determined to be no longer indefinite and are tested for impairment annually or more frequently if events or changes in circumstances indicate that the asset might be impaired.  The Company’s intangible assets and related accumulated amortization at December 28, 2019 and December 29, 2018 consisted of the following:     December 28, 2019 December 29, 2018  Accumulated Accumulated  (dollars in thousands) Gross Amortization Net Gross Amortization Net  Liquor licenses $ 14,905 $ - $ 14,905 $ 14,226 $ - $ 14,226  Asset acquisitions and other 5,083 2,888 2,195 11,870 4,975 6,895  Total $ 19,988 $ 2,888 $ 17,100 $ 26,096 $ 4,975 $ 21,121  Intangible assets with a definite useful life are generally amortized on a straight-line basis over periods up to 10 years for customer lists. Estimated amortization expense for the next five fiscal years is appro ximately $455 thousand in 2020, $444 thousand in 2021, $314 thousand in 2022, and $310 thousand in 2023 and 2024, respectively. As of December 28, 2019 , the Company’s intangible assets with indefinite lives consisted of goodwill and liquor licenses. Note 1 Summary of Significant Accounting Policies (continued)  (l) Impairment of Long-Lived Assets The Company periodically evaluates the period of depreciation or amortization for long-lived assets to determine whether current circumstances warrant revised estimates of useful lives. The Company completes an impairment test annually. The Company also reviews its property and equipment for impairment whenever events or changes in circumstances indicate the carrying value of an asset may not be recoverable. Recoverability is measured by a comparison of the carrying amount to the net undiscounted cash flows expected to be generated by the asset. An impairment loss would be recorded for the excess of net book value over the fair value of the asset impaired. The fair value is estimated based on current market values or expected discounted future cash flows.  With respect to owned property and equipment associated with closed stores, the value of the property and equipment would be adjusted to reflect recoverable values if current economic conditions and estimated fair values of the property was less than the net book value.  In accordance with Accounting Standards Codification No. 360, Property, Plant and Equipment , the Company recorded a pre-tax charge of $1.5 million in the fourth quarter of 2018 for the impairment of long-lived assets, including equipment and leasehold improvements. The charge was a result of management determining that the net book value of this property was less than the recoverable value. This charge was included as a component of "Operating, general and administrative expenses." Management determined that no assets met the impairment criteria as of December 28, 2019.  The results of impairment tests are subject to management’s estimates and assumptions of projected cash flows and operating results. The Company believes that, based on current conditions, materially different reported results are not likely to result from long-lived asset impairments. However, a change in assumptions or market conditions could result in a change in estimated future cash flows and the likelihood of materially different reported results.  (m) Self-Insurance The Company is self-insured for a majority of its workers’ compensation, general liability, vehicle accident and associate medical benefit claims. The self-insurance liability for most of the medical benefit claims is determined based on historical data and an estimate of claims incurred but not reported. The other self-insurance liabilities including workers’ compensation are determined actuarially, based on claims filed and an estimate of claims incurred but not yet reported. The Company is self-insured for certain healthcare claims and stop-loss coverage is maintained for occurrences exceeding a $500 thousand specific deductible with a $250 thousand aggregating deductible. The Company is liable for workers' compensation claims up to $2.0 million per claim . Property and casualty insurance coverage is maintained with outside carriers at deductible or retention levels ranging from $100 thousand to $1.0 million . Significant assumptions used in the development of the actuarial estimates include reliance on the Company’s historical claims data including average monthly claims and average lag time between incurrence and reporting of the claim .  (n) Income Taxes The Company recognizes deferred tax assets and liabilities for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The Company reviews the tax positions taken or expected to be taken on tax returns to determine whether and to what extent a benefit can be recognized in the Consolidated Financial Statements. Refer to Note 10 to the Consolidated Financial Statements for the amount of unrecognized tax benefits and other disclosures related to uncertain tax positions. To the extent interest and penalties would be assessed by taxing authorities on any underpayment of income tax, such amounts are accrued and classified as a component of income tax expense. Note 1 Summary of Significant Accounting Policies (continued)  (o) Earnings Per Share Earnings per share are based on the weighted-average number of common shares outstanding.  (p) Revenue Recognition Revenue from the sale of products to the Company’s customers is recognized at the point of sale. Discounts provided to customers at the point of sale through the Weis Club Preferred Shopper loyalty program are recognized as a reduction in sales as products are sold. Periodically, the Company will run a point-based sales incentive program that rewards customers with future sales discounts. The Company makes reasonable and reliable estimates of the amount of future discounts based upon historical experience and its customer data tracking software. Sales are reduced rationally and systematically by these estimates over the life of the program. Discounts to customers at the point of sale provided by vendors, usually in the form of paper coupons, are not recognized as a reduction in sales provided the discounts are redeemable at any retailer that accepts those discounts. The Company records “Deferred revenue” for the sale of gift cards and revenue is recognized in “Net sales” at the time of customer redemption for products. Gift card breakage income is recognized in “Operating, general and administrative expenses” based upon historical redemption patterns and represents the balance of gift cards for which the Company believes the likelihood of redemption by the customer is remote. Sales tax is excluded from “Net sales.” The Company charges sales tax on all taxable customer purchases and remits these taxes monthly to the appropriate taxing jurisdiction. Merchandise return activity is immaterial to revenues due to products being returned quickly and the relatively low unit cost.  (q) Cost of Sales, Including Advertising, Warehousing and Distribution Expenses “Cost of sales, including advertising, warehousing and distribution expenses” consists of direct product costs (net of discounts and allowances), advertising (net of vendor paid cooperative advertising credits), distribution center and transportation costs, as well as manufacturing facility operations. Advertising costs, net of vendor paid cooperative advertising credits, are expensed as incurred which are primarily funded by vendor cooperative advertising credits and occur in the same period as the product is sold.  (r) Vendor Allowances Vendor allowances related to the Company's buying and merchandising activities are recorded as a reduction of cost of sales as they are earned, in accordance with the underlying agreement. Off-invoice and bill-back allowances are used to reduce direct product costs upon the receipt of goods. Promotional rebates and credits are accounted for as a reduction in the cost of inventory and recognized when the related inventory is sold. Volume incentive discounts are realized as a reduction of cost of sales at the time it is deemed probable and reasonably estimable that the incentive target will be reached. Long-term contract incentives, which require an exclusive vendor relationship, are allocated over the life of the contract. Promotional allowance funds for specific vendor-sponsored programs are recognized as a reduction of cost of sales as the program occurs and the funds are earned per the agreement. Cash discounts for prompt payment of invoices are realized in cost of sales as invoices are paid. Warehouse and back-haul allowances provided by suppliers for distributing their product through the Company’s distribution system are recorded in cost of sales offsetting costs incurred. Warehouse slotting allowances are recorded in cost of sales when new items are initially set up in the Company's distribution system, which is when the related expenses are incurred and performance under the agreement is complete. Swell allowances for damaged goods are realized in cost of sales as provided by the supplier, helping to offset product shrink losses also recorded in cost of sales.  Vendor allowances recorded as credits in cost of sales totaled $130.4 million in 2019 , $ 132.0 million in 2018 and $131.1 million in 2017 . Vendor paid cooperative advertising credits totaled $24.8 million in 2019 , $ 19.4 million in 2018 and $19.2 million in 2017 . These credits were netted against advertising costs within “Cost of Sales, including Advertising, Warehousing and Distribution expenses.” The Company had accounts receivable due from vendors of $1.0 million and $1.6 million for earned advertising credits and $9.5 million and $12.8 million for earned promotional discounts as of December 28, 2019 and December 29, 2018 , respectively. The Company had $5.4 million and $7.4 million in unearned income included in accrued liabilities for unearned vendor programs under long-term contracts for display and shelf space allocation as of December 28, 2019 and December 29, 2018 , respectively.  (s) Operating, General and Administrative Expenses Business operating costs including expenses generated from administration and purchasing functions, are recorded in “Operating, general and administrative expenses” in the Consolidated Statements of Income. Business operating costs include items such as wages, benefits, utilities, repairs and maintenance, rent, insurance, depreciation, leasehold amortization and costs for outside provided services.  (t) Advertising Costs The Company expenses advertising costs as incurred. The Company recorded advertising expense, before vendor paid cooperative advertising credits, of $30.3 million in 2019 , $30 .5 million in 2018 and $31.0 million in 2017 in “Cost of Sales, including Advertising, Warehousing and Distribution Expenses.” Note 1 Summary of Significant Accounting Policies (continued)  (u) Rental and Commission Income The Company leases or subleases space to tenants in owned, vacated and open store facilities. Rental income is recorded when earned as a component of “Operating, general and administrative expenses.” All leases are operating leases, as disclosed in Note 5.  The Company provides a variety of services to its customers, including but not limited to lottery, money orders, third-party gift cards, and third-party bill pay services. Commission income earned from these services are recorded when earned as a component of “Operating, general and administrative expenses.”  (v) Current Relevant Accounting Standards The Company adopted ASU 2016-02 Leases (Topic 842) effective December 30, 2018. The ASU requires lessees to recognize assets and liabilities for the rights and obligations created by their leases with lease terms geater than 12 months. During 2018, the ASU was amended to permit the election of transitional provisions, including the el i mination of the requirement to restate reporting periods prior to the date of adoption. The Company has adopted the standard using transitional provisions and has elected practical expedients to not reassess the original conclusions reached regarding lease identification, lease classification and initial direct costs. The adoption had a significant impact on the Company’s Consolidated Balance Sheets, resulting in $202 million and $211 million of the operating lease right-to-use assets and lease liabilities, respectively. There are no significant changes to the Consolidated Statements of Comprehensive Income or Consolidated Statements of Cash Flows. See Note 5 for additional disclosures on the adoption. 

Marketable Securities

Marketable Securities	12 Months Ended
	Dec. 28, 2019
Marketable Securities [Abstract]
Marketable Securities	Note 2 Marketable Securities The Company’s marketable securities are all classified as available-for-sale within “Current Assets” in the Company’s Consolidated Balance Sheets. FASB has established three levels of inputs that may be used to measure fair value:  Level 1 Observable inputs such as quoted prices in active markets for identical assets or liabilities; Level 2 Observable inputs, other than Level 1 inputs in active markets, that are observable either directly or indirectly; and Level 3 Unobservable inputs for which there is little or no market data, which require the reporting entity to develop its own assumptions.  The Company’s marketable securities valued using Level 1 inputs include three public company equity securities, for which quoted market prices are available . The Company’s bond portfolio is valued using Level 2 inputs. The Company’s municipal bonds are valued using a combination of pricing for similar securities, recently executed transactions, cash flow models with yield curves and other pricing models utilizing observable inputs, which are considered Level 2 inputs.  For Level 2 investment valuation, the Company utilizes standard pricing procedures of its investment advisory firm(s), which include various third-party pricing services. These procedures also require specific price monitoring practices as well as pricing review reports, valuation oversight and pricing challenge procedures to maintain the most accurate representation of investment fair market value.  The Company accrues interest on its bond portfolio throughout the life of each bond held. Dividends from the equity securities are recognized as received. Both interest and dividends are recognized in “Investment income and interest expense” on the Company’s Consolidated Statements of Income. The Company recognized investment income of $7.1 million and loss of $1.2 million which included an unrealized gain in equity securities of $2.0 million and loss in equity securities of $1.6 million in the fiscal years ended December 28, 2019 and December 29, 2018, respectively.  Marketable securities, as of December 28, 2019 and December 29, 2018 , consisted of:     Gross Gross  (dollars in thousands) Amortized Unrealized Unrealized Fair  December 28, 2019 Cost Holding Gains Holding Losses Value  Available-for-sale:  Level 1  Equity securities $ 9,201  Level 2  Municipal bonds $ 52,264 $ 2,091 $ (18) 54,337  $ 52,264 $ 2,091 $ (18) $ 63,538      Gross Gross  (dollars in thousands) Amortized Unrealized Unrealized Fair  December 29, 2018 Cost Holding Gains Holding Losses Value  Available-for-sale:  Level 1  Equity securities $ 7,226  Level 2  Municipal bonds $ 46,699 $ 426 $ (53) 47,072  $ 46,699 $ 426 $ (53) $ 54,298  Maturities of marketable securities classified as available-for-sale at December 28, 2019 , were as follows:    Amortized Fair  (dollars in thousands) Cost Value  Available-for-sale:  Due within one year $ 4,666 $ 4,678  Due after one year through five years 28,773 29,535  Due after five years through ten years 18,825 20,124  $ 52,264 $ 54,337   Note 2 Marketable Securities (continued)  SERP Investments The Company also maintains a non-qualified supplemental executive retirement plan for certain of its associates which allows them to defer income to future periods. Participants in the plans earn a return on their deferrals based on mutual fund investments. The Company chooses to invest in the underlying mutual fund investments to offset the liability associated with the non-qualified deferred compensation plans. Such investments are reported on the Company’s Consolidated Balance Sheets as “SERP investment,” are classified as trading securities and are measured at fair value using Level 1 inputs with gains and losses included in “Investment income and interest expense” on the Company’s Consolidated Statements of Income. The changes in the underlying liability to the associates are recorded in “Other income (expense) .”

Inventories

Inventories	12 Months Ended
	Dec. 28, 2019
Inventories [Abstract]
Inventories	Note 3 Inventories Merchandise inventories, as of December 28, 2019 and December 29, 2018 , were valued as follows:     (dollars in thousands) 2019 2018  LIFO $ 204,043 $ 211,911  Average cost 75,763 68,845  $ 279,806 $ 280,756  Management believes the use of the LIFO method for valuing certain inventories represents the most appropriate matching of costs and revenues in the Company’s circumstances. If all inventories were valued on the average cost method, which approximates current cost, total inventories would have been $70.7 million and $76.5 million higher than as reported on the above methods as of December 28, 2019 and December 29, 2018 , respectively. During 2019 and 2018, the Company had certain decrements in its LIFO pools, which had an insignificant impact on the cost of sales.

Property and Equipment

Property and Equipment	12 Months Ended
	Dec. 28, 2019
Property and Equipment [Abstract]
Property and Equipment	Note 4 Property and Equipment Property and equipment, as of December 28, 2019 and December 29, 2018 , consisted of:     Useful Life  (dollars in thousands) ( in years) 2019 2018  Land $ 137,977 $ 133,386  Buildings and improvements 10 - 60 736,812 713,128  Equipment 3 - 12 1,096,252 1,069,616  Leasehold improvements 5 - 20 217,664 224,231  Total, at cost 2,188,705 2,140,361  Less accumulated depreciation and amortization 1,301,777 1,252,753  $ 886,928 $ 887,608

Lease Commitments

Lease Commitments	12 Months Ended
	Dec. 28, 2019
Lease Commitments [Abstract]
Lease Commitments	Note 5 Lease Commitments The adoption of ASU 2016-02 Leases (Topic 842) had a significant impact on the Company’s Consolidated Balance Sheets, resulting in operating lease right-to-use assets of $202 million and lease liabilities of $211 million. The difference between the operating lease right-to-use assets and lease liabilities represents prepaid and accrued rents, unfavorable lease obligations, favorable lease assets and deferred tenant allowances associated with operating leases as of December 30, 2018 and reclassified against the operating lease right-to-use asset upon adoption.  As of December 28 , 201 9 , the Company leased approximately 52% of its open store facilities under operating leases that expire at various dates through 203 5 , with the remaining store facilities being owned. These leases generally provide for fixed annual rentals; however, several provide for minimum annual rentals plus variable lease costs related to real estate taxes and insurance as well as contingent rentals based on a percentage of annual sales or increases periodically based on inflation. These variable lease costs are not included in the measurement of the operating lease right-to-use assets or lease liabilities and are charged to the related expense category included in “Operating, general and administrative expenses.” Most of the leases contain multiple renewal options, under which the Company may extend the lease terms from 5 to 20 years. Additionally, the Company has operating leases for certain transportation and other equipment.  The Company leases or subleases space to tenants in owned, vacated and open store facilities. Rental income is recorded when earned as a component of “Operating, general and administrative expenses.”  The following is a schedule of the lease costs included in “Operating, general and administrative expenses” for the fiscal year ended December 28, 2019.     (dollars in thousands) 2019  Operating lease cost $ 46,063  Variable lease cost 10,998  Lease or sublease income (7,749)  Net lease cost $ 49,312  T he following is a schedule by years of the future minimum rental payments required under operating leases and total minimum sublease and lease rental income to be received as of December 28, 2019.     (dollars in thousands) Leases Subleases  2020 $ 47,184 (4,044)  2021 42,607 (3,480)  2022 35,845 (2,901)  2023 31,063 (2,308)  2024 26,256 (1,663)  Thereafter 75,622 (6,336)  Total Lease Payments $ 258,577 (20,732)  Less: Interest 39,809 -  Present value of lease liabilities 218,768 (20,732) The following is a schedule of weighted-average remaining lease terms and weighted-average discount rates as of December 28, 2019 and December 30, 2018.     Lease Term and Discount Rate December 28, 2019 December 30, 2018  Weighted-average remaining lease term 4.44 4.69  Weighted-average discount rate 3.47% 3.84%    Prior to the adoption of the ASU, leases generally provide for fixed annual rentals , minimum annual rentals , contingent rentals and sublease income .  Rent expense and income on all leases for the fiscal years ended December 29, 2018 and December 30, 2017 consisted of :    (dollars in thousands) 2018 2017  Minimum annual rentals $ 47,253 $ 46,804  Contingent rentals 419 432  Lease or sublease income (7,757) (7,612)  $ 39,915 $ 39,624  

Retirement Plans

Retirement Plans	12 Months Ended
	Dec. 28, 2019
Retirement Plans [Abstract]
Retirement Plans	Note 6 Retirement Plans The Company has a qualified retirement savings plan, the Weis Markets, Inc. Retirement Savings Plan, covering substantially all associates. The plan has a contributory component as well as a noncontributory profit-sharing component for certain associates. The noncontributory component covers eligible associates which included certain salaried associates, store management and administrative support personnel. The Company also has a non-qualified supplemental retirement plan covering highly compensated employees of the Company. The Company’s policy is to fund retirement plan costs as accrued, with the exception of the deferred compensation plan. Employer contributions to the qualified retirement plan are made at the sole discretion of the Company.  Retirement plan costs:     (dollars in thousands) 2019 2018 2017  Retirement savings plan 3,434 3,525 3,343  Deferred compensation plan 801 508 813  Supplemental executive retirement plan 498 390 531  $ 4,733 $ 4,423 $ 4,687  The Company maintains a non-qualified deferred compensation plan for the payment of specific amounts of annual retirement benefits to certain officers or their beneficiaries over an actuarially computed normal life expectancy. Currently, there are no active officers in the plan. The expected payments under the plan provisions were determined through actuarial calculations dependent on the age of the recipient, using an assumed discount rate. The plan is unfunded and accounted for on an accrual basis. The recorded liability at December 28, 2019 is $4.2 million which is based on expected payments to be made over the remaining lives of the beneficiaries. This amount is included in “Accrued expenses” and “Postretirement benefit obligations” in the Consolidated Balance Sheets. The expected payment amounts are approximately $1.0 million for 2020 and for the years thereafter dependent on the lives of the beneficiaries.  The Company also maintains a non-qualified supplemental executive retirement plan for certain of its associates. This plan is designed to provide retirement benefits and salary deferral opportunities because of limitations imposed by the Internal Revenue Code and the Regulations implemented by the Internal Revenue Service. This plan is unfunded and accounted for on an accrual basis. Participants in this plan are excluded from participation in the profit sharing portion of the Weis Markets, Inc. Retirement Savings Plan once their yearly earnings exceed the IRS highly compensated threshold. The Board of Directors annually determines the amount of the allocation to the plans at its sole discretion. The allocation among the various plan participants is made in both flat dollar amounts and in relationship to their compensation. Plan participants are 100% vested in their accounts after three years of service with the Company. Benefits are distributed among participants upon termination or retirement . Substantial risk of benefit forfeiture does exist for participants in this plan. The present value of accumulated benefits amounted to $19.0 million and $14.7 million at December 28, 2019 and December 29, 2018 , respectively, and is included in “Postretirement benefit obligations” in the Consolidated Balance Sheets.

Revenue Recognition

Revenue Recognition	12 Months Ended
	Dec. 28, 2019
Revenue Recognition [Abstract]
Revenue Recognition	Note 7 Revenue Recognition The adoption of ASU 2014-9 Revenue from Contracts with Customers (ASC 606) did not have a material impact on the Company’s Consolidated Financial Statements. The Chief Operating Officer, the Company’s chief operating decision maker, analyzed store operational revenues by geographical area but each area offers customers similar product, has similar distribution methods, and supported by centralized management processes. The Company’s operations are reported as a single reportable segment.  The following table represents net sales by type of product for years ending December 28, 2019, December 29, 2018 and December 30, 2017.    52 Weeks Ended  ( dollars in thousands ) December 28, 2019 December 29, 2018 December 30, 2017  Grocery $ 3,068,754 86.6 % $ 3,063,218 87.3 % $ 3,041,481 87.7 %  Pharmacy 337,233 9.5 314,584 9.0 309,079 8.9  Fuel 127,828 3.6 125,993 3.6 109,467 3.2  Manufacturing 9,484 0.3 5,475 0.1 6,780 0.2   Total net sales $ 3,543,299 100.0 % $ 3,509,270 100.0 % $ 3,466,807 100.0 %  

Prior Year Reclassifications

Prior Year Reclassifications	12 Months Ended
	Dec. 28, 2019
Prior Year Reclassifications [Abstract]
Prior Year Reclassifications	Note 8 Prior Year Reclassifications As of December 28, 2019, the Company reclassified non-service components of the Supplemental Executive Retirement Plan (SERP) benefit obligation separately from the service cost component. These non-service components in the amounts of $3.0 million, $(0.9) million and $2.1 million as of December 28, 2019, December 29, 2018 and December 30, 2017, respectively, were reclassified to “Other income (expense)”. The Company recognizes service cost components in “Operating, general and administrative costs”.  The table below summarizes the effect of the reclassifications of previously reported Consolidated Financial Statements for the fiscal years ended December 29, 2018 and December 30, 2017.     December 29, 2018 December 30, 2017  Consolidated Statements of Income As Previously As Previously  (dollars in thousands) Reported Reclassifications As Adjusted Reported Reclassifications As Adjusted  Operating, general and administrative expenses $ 851,411 $ 919 $ 852,330 $ 836,098 $ (2,094) $ 834,004  Income from operations 83,590 (919) 82,671 76,425 2,094 78,519  Other income (expense) - 919 919 - (2,094) (2,094) 

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 28, 2019
Accumulated Other Comprehensive Income [Abstract]
Accumulated Other Comprehensive Income	Note 9 Accumulated Other Comprehensive Income All balances in accumulated other comprehensive income are related to available-for-sale marketable securities. The following table sets forth the balance of the Company’s accumulated other comprehensive income, net of tax.    Unrealized Gains  on Available-for-Sale  (dollars in thousands) Marketable Securities  Accumulated other comprehensive income balance as of December 30, 2017 $ 5,880   Amount reclassified to retained earnings for equity unrealized gain (adoption of ASU 2016-01) (5,481)  Other comprehensive loss before reclassifications (177)  Amounts reclassified from accumulated other comprehensive income 40  Net current period other comprehensive Income (5,618)  Accumulated other comprehensive income balance as of December 29, 2018 $ 262   Other comprehensive income before reclassifications 1,255  Amounts reclassified from accumulated other comprehensive income (37)  Net current period change in other comprehensive income 1,218  Accumulated other comprehensive income balance as of December 28, 2019 $ 1,480  The following table sets forth the effects on net income of the amounts reclassified out of accumulated other comprehensive income for the periods ended December 28, 2019 , December 29, 2018 and December 30, 2017 .    Amounts Reclassified from  Accumulated Other Comprehensive Income to the  Consolidated Statements of Income  (dollars in thousands) Location 2019 2018 2017  Unrealized gains (losses) on available-for-sale marketable securities  Investment income and interest expense $ (51) $ (54) $ (40)  Provision for income taxes 14 14 11  Total amount reclassified, net of tax $ (37) $ (40) $ (29) 

Income Taxes

Income Taxes	12 Months Ended
	Dec. 28, 2019
Income Taxes [Abstract]
Income Taxes	Note 10 Income Taxes The provision (benefit) for income taxes consists of:    (dollars in thousands) 2019 2018 2017  Current:  Federal $ 11,779 $ 11,385 $ 10,630  State 3,117 4,594 1,972  Deferred:  Federal 6,636 6,059 (34,659)  State (871) (2,640) 2,666  $ 20,661 $ 19,398 $ (19,391)  The reconciliation of income taxes computed at the federal statutory rate of 21% in 2019 and 2018, respectively, and 35% in 2017. Ending deferred tax liability has been computed at the federal statutory rate of 21% due to the Tax Reform.    (dollars in thousands) 2019 2018 2017  Income taxes at federal statutory rate $ 18,615 $ 17,249 $ 27,658  State income taxes, net of federal income tax benefit 1,333 639 1,306  Nondeductible employee-related expenses 1,974 768 1,828  2017 tax reform - 657 (49,336)  Other (1,261) 85 (847)  Provision for income taxes (effective tax rate 23.3% , 23.6% and (24.5)% , respectively) $ 20,661 $ 19,398 $ (19,391)  The effective income tax rate was 23.3% , 23.6% and negative 24.5% in 2019, 2018, and 2017, respectively. The effective income tax rate differs from the federal statutory rate of 21% primarily due to state taxes. On December 22, 2017, the U.S. Government enacted the Tax Cuts and Jobs Act (the “Tax Reform”). The Tax Reform significantly impacted the Company’s effective income tax rate by reducing the U.S. federal corporate tax rate from 35% to 21% effective January 1, 2018 and allowing immediate expensing of qualified assets placed into service after September 27, 2017. Other elements of the Tax Reform have minor impacts, however the above mentioned decreased deferred income tax by $49.3 million during 2017.  Cash paid for federal income taxes was $11.3 million, $4.5 million $12.0 million and in 2019, 2018 and 2017 respectively. Cash paid for state income taxes was $2.8 million, $2.1 million and $1.0 million in 2019, 2018 and 2017 respectively.  The tax effects of temporary differences that give rise to deferred tax assets and deferred tax liabilities at December 28, 2019 and December 29, 2018 , are:    (dollars in thousands) 2019 2018  Deferred tax assets:  Accounts receivable $ 749 $ 588  Compensated absences - 355  Employment incentives 1,405 842  Employee benefit plans 4,853 4,914  General liability insurance 2,778 2,702  Postretirement benefit obligations 5,767 5,272  Net operating loss carryforwards 6,582 8,030  Other 8,136 7,967  Total deferred tax assets 30,270 30,670  Deferred tax liabilities:  Inventories (13,072) (9,828)  Unrealized gains on marketable securities (2,851) (1,809)  Nondeductible accruals and other (5,252) (5,274)  Depreciation (106,136) (104,552)  Total deferred tax liabilities (127,311) (121,463)  Net deferred tax liability $ (97,041) $ (90,793)  Note 10 Income Taxes (continued) The following table summarizes the activity related to the Company’s unrecognized tax benefits:     (dollars in thousands) 2019 2018  Unrecognized tax benefits at beginning of year $ 6,405 $ 4,691  Increases based on tax positions related to the current year 1,769 1,714  Additions for tax positions of prior year - -  Reductions for tax positions of prior years - -  Settlements - -  Expiration of the statute of limitations for assessment of taxes (1,562) -  Unrecognized tax benefits at end of year $ 6,612 $ 6,405  The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate was $1.8 million in 2019, $1.7 million in 2018 and $1.6 million in 2017. The Company or one of its subsidiaries files tax returns in the United States and various state jurisdictions. The tax years subject to examination in the United State and in Pennsylvania, where the majority of the Company's revenues are generated, are 2016 to 2019 . The Company has net operating loss carryforwards of $8 3 . 4 million available for state income tax purposes. The net operating losses will begin to expire starting in 2027 . The Company expects to fully utilize these net operating loss carryforwards.

Summary of Quarterly Results

Summary of Quarterly Results	12 Months Ended
	Dec. 28, 2019
Summary of Quarterly Results [Abstract]
Summary of Quarterly Results	Note 11 Summary of Quarterly Results (Unaudited) Quarterly financial data for 2019 and 2018 are as follows:    (dollars in thousands, except per share amounts) Thirteen Weeks Ended  March 30, 2019 June 29, 2019 September 28, 2019 December 28, 2019  Net sales $ 876,718 $ 887,967 $ 876,222 $ 902,392  Gross profit on sales 229,552 236,670 232,825 239,147  Net income 14,304 20,475 14,319 18,885  Basic and diluted earnings per share $ .53 $ .76 $ .53 $ .70      (dollars in thousands, except per share amounts) Thirteen Weeks Ended  March 31, 2018 June 30, 2018 September 29, 2018 December 29, 2018  Net sales $ 876,106 $ 871,100 $ 869,076 $ 892,988  Gross profit on sales 234,907 240,295 232,340 227,459  Net income 16,191 19,095 14,207 13,245  Basic and diluted earnings per share $ .60 $ .71 $ .53 $ .49  

Fair Value Information

Fair Value Information	12 Months Ended
	Dec. 28, 2019
Fair Value Information [Abstract]
Fair Value Information	Note 12 Fair Value Information The carrying amounts for cash, accounts receivable and accounts payable approximate fair value because of the short maturities of these instruments. The fair values of the Company’s marketable securities, as disclosed in Note 2, are based on quoted market prices and institutional pricing guidelines for those securities not classified as Level 1 securities. The Company’s SERP investments are classified as trading securities and are carried at fair value using Level 1 inputs.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 28, 2019
Commitments and Contingencies [Abstract]
Commitments and Contingencies	Note 13 Commitments and Contingencies The Company is involved in various legal actions arising out of the normal course of business. The Company also accrues for tax contingencies when it is probable that a liability to a taxing authority has been incurred and the amount of the contingency can be reasonably estimated, based on experience. In the opinion of management, the ultimate disposition of these matters will not have a material adverse effect on the Company's consolidated financial position, results of operations or liquidity. 

Long-Term Debt

Long-Term Debt	12 Months Ended
	Dec. 28, 2019
Long-Term Debt [Abstract]
Long-Term Debt	Note 14 Long-Term Debt On September 1, 2016 Weis Markets entered into a revolving credit agreement with Wells Fargo Bank, National Association (the “Credit Agreement”), which was amended on August 21, 2019 and matu res on September 1, 20 22 . The Credit Agreement provides for an unsecured revolving credit facility with an aggregate principal amount not to exceed $30.0 million with an additional discretionary amount available of $70.0 million. As of December 28, 2019, the availability under the revolving credit agreement was $18.8 million, net of $11.2 million letters of credit. The letters of credit are maintained primarily to support performance, payment, deposit or surety obligations of the Company.  Interest expense related to long-term debt was $55 thousand and $288 thousand for 2019 and 2018 , respectively.

Valuation and Qualifying Accoun

Valuation and Qualifying Accounts	12 Months Ended
	Dec. 28, 2019
Valuation and Qualifying Accounts [Abstract]
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]	Schedule II - Valuation and Qualifying Accounts:   SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS WEIS MARKETS, INC. (dollars in thousands)      Col. A Col. B Col. C Col. D Col. E  Additions  Balance at Charged to Charged to Balance at  Beginning Costs and Accounts Deductions End of  Description of Period Expenses Describe Describe (1) Period  Fiscal Year ended December 28, 2019:  Deducted from asset accounts:  Allowance for uncollectible accounts $ 2,090 $ 1,975 $ --- $ 1,308 $ 2,757   Fiscal Year ended December 29, 2018:  Deducted from asset accounts:  Allowance for uncollectible accounts $ 1,946 $ 1,144 $ --- $ 1,000 $ 2,090   Fiscal Year ended December 30, 2017:  Deducted from asset accounts:  Allowance for uncollectible accounts $ 1,455 $ 2,176 $ --- $ 1,685 $ 1,946  (1) Deductions are uncollectible accounts written off, net of recoveries.

Summary Of Significant Accoun_2

Summary Of Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 28, 2019
Summary Of Significant Accounting Policies [Abstract]
Description of Business [Policy Text Block]	(a) Description of Business Weis Markets, Inc. is a Pennsylvania business corporation formed in 1924. The Company is engaged principally in the retail sale of food in Pennsylvania and surrounding states. The Company’s operations are reported as a single reportable segment. There was no material change in the nature of the Company's business during fiscal 2019 .
Definition of Fiscal Year [Policy Text Block]	(b) Definition of Fiscal Year The Company’s fiscal year ends on the last Saturday in December. Fiscal 2019 was comprised of 52 weeks, ending on December 28, 2019 . Fiscal 2018 was comprised of 52 weeks, ending on December 29, 2018 . Fiscal 2017 was comprised of 52 weeks, ending on December 30, 2017 . References to years in this Annual Report relate to fiscal years.
Principles of Consolidation [Policy Text Block]	(c) Principles of Consolidation The Consolidated Financial Statements include the accounts of the Company and its subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates [Policy Text Block]	(d) Use of Estimates Management of the Company has made a number of estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities to prepare these Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America. Actual results could differ from those estimates.
Cash and Cash Equivalents [Policy Text Block]	(e) Cash and Cash Equivalents The Company maintains its cash balances in the form of core checking accounts and money market accounts. The Company maintains cash deposits with banks that at times exceed applicable insurance limits. The Company reduces its exposure to credit risk by maintaining such deposits with high quality financial institutions that management believes are creditworthy.  The Company considers investments with an original maturity of three months or less to be cash equivalents. Investment amounts classified as cash equivalents as of December 28, 2019 and December 29, 2018 totaled $32.9 million and $5. 4 million , respectively.  Consumer electronic payments accepted at the point of sale, including all credit card, debit card and electronic benefits transfer transactions that process in three days or less are classified as cash equivalents. Consumer electronic payment amounts classified as cash equivalents as of December 28, 2019 and December 29, 2018 totaled $23.1 million and $23.6 million, respectively. 
Marketable Securities [Policy Text Block]	(f) Marketable Securities Marketable securities consist of municipal bonds and equity securities. The Company invests primarily in high-grade marketable debt securities. The Company classifies all of its marketable securities as available-for-sale.  Available-for-sale securities are recorded at fair value as determined by quoted market price based on national markets. Unrealized holding gains and losses, net of the related tax effect, on municipal bonds are excluded from earnings and are reported as a separate component of shareholders’ equity until realized. Unrealized holding gains and losses on equity securities are recorded in investment income (loss) and interest expense. A decline in the fair value below cost that is deemed other than temporary results in a charge to earnings and the establishment of a new cost basis for the security. Dividend and interest income is recognized when earned. Realized gains and losses are included in earnings and are derived using the specific identification method for determining the cost of securities.  Equity securities are measured at fair value and the unrealized holding gains and losses are recorded in investment income (loss) and interest expense. The Company recognized a $2.0 million gain in 2019 and a $1.6 million loss in 2018.
Accounts Receivable [Policy Text Block]	(g) Accounts Receivable Accounts receivable are stated net of an allowance for uncollectible accounts of $2.8 million and $2.1 million as of December 28, 2019 and December 29, 2018 , respectively. The reserve balance relates to amounts due from pharmacy third party providers, retail customer returned checks, manufacturing customers, vendors and tenants. The Company maintains an allowance for the amount of receivables deemed to be uncollectible and calculates this amount based upon historical collection activity adjusted for current conditions.
Inventories [Policy Text Block]	(h) Inventories Inventories are valued at the lower of cost or net realizable value, using both the retail inventory and average cost methods. The retail inventory method is commonly used by retail companies to determine cost and calculate gross margin based on applying a cost-to-retail ratio to each similar merchandise category’s ending retail value. The Company’s center store and pharmacy inventories are valued using last in, first out (LIFO). The Company’s fresh inventories are valued using average cost. The Company evaluates inventory shortages throughout the year based on actual physical counts in its facilities. Allowances for inventory shortages are recorded based on the results of these counts and to provide for estimated shortages from the last physical count to the financial statement date.
Property and Equipment [Policy Text Block]	(i) Property and Equipment Property and equipment are recorded at cost. Depreciation is provided on the cost of buildings and improvements and equipment using the straight-line method.  Leasehold improvements are amortized using the straight-line method over the terms of the leases or the useful lives of the assets, whichever is shorter.  Maintenance and repairs are expensed and renewals and betterments are capitalized. When assets are retired or otherwise disposed of, the assets and accumulated depreciation are removed from the respective accounts and any profit or loss on the disposition is credited or charged to “Operating, general and administrative expenses.” 
Leases	(j) Leases The Company leases approximately 52% of its open store facilities under operating leases that expire at various dates through 2035, with the remaining store facilities being owned. These leases generally provide for fixed annual rentals; however, several provide for minimum annual rentals plus variable lease costs related to real estate taxes and insurance as well as contingent rentals based on a percentage of annual sales or increases periodically based on inflation. These variable lease costs are not included in the measurement of the operating lease right-to-use assets or lease liabilities and are charged to the related expense category included in “Operating, general and administrative expenses.” Most of the leases contain multiple renewal options, under which the Company may extend the lease terms from 5 to 20 years. Additionally, the Company has operating leases for certain transportation and other equipment. The Company leases or subleases space to tenants in owned, vacated and open store facilities. Rental income is recorded when earned as a component of “Operating, general and administrative expenses.”
Goodwill and Intangible Assets [Policy Text Block]	(k) Goodwill and Intangible Assets Goodwill is not amortized but tested for impairment on an annual basis and between annual tests when indicators of impairment are identified. Intangible assets with an indefinite useful life are not amortized until their useful life is determined to be no longer indefinite and are tested for impairment annually or more frequently if events or changes in circumstances indicate that the asset might be impaired.  The Company’s intangible assets and related accumulated amortization at December 28, 2019 and December 29, 2018 consisted of the following:     December 28, 2019 December 29, 2018  Accumulated Accumulated  (dollars in thousands) Gross Amortization Net Gross Amortization Net  Liquor licenses $ 14,905 $ - $ 14,905 $ 14,226 $ - $ 14,226  Asset acquisitions and other 5,083 2,888 2,195 11,870 4,975 6,895  Total $ 19,988 $ 2,888 $ 17,100 $ 26,096 $ 4,975 $ 21,121  Intangible assets with a definite useful life are generally amortized on a straight-line basis over periods up to 10 years for customer lists. Estimated amortization expense for the next five fiscal years is appro ximately $455 thousand in 2020, $444 thousand in 2021, $314 thousand in 2022, and $310 thousand in 2023 and 2024, respectively. As of December 28, 2019 , the Company’s intangible assets with indefinite lives consisted of goodwill and liquor licenses.
Impairment of Long-Lived Assets [Policy Text Block]	(l) Impairment of Long-Lived Assets The Company periodically evaluates the period of depreciation or amortization for long-lived assets to determine whether current circumstances warrant revised estimates of useful lives. The Company completes an impairment test annually. The Company also reviews its property and equipment for impairment whenever events or changes in circumstances indicate the carrying value of an asset may not be recoverable. Recoverability is measured by a comparison of the carrying amount to the net undiscounted cash flows expected to be generated by the asset. An impairment loss would be recorded for the excess of net book value over the fair value of the asset impaired. The fair value is estimated based on current market values or expected discounted future cash flows.  With respect to owned property and equipment associated with closed stores, the value of the property and equipment would be adjusted to reflect recoverable values if current economic conditions and estimated fair values of the property was less than the net book value.  In accordance with Accounting Standards Codification No. 360, Property, Plant and Equipment , the Company recorded a pre-tax charge of $1.5 million in the fourth quarter of 2018 for the impairment of long-lived assets, including equipment and leasehold improvements. The charge was a result of management determining that the net book value of this property was less than the recoverable value. This charge was included as a component of "Operating, general and administrative expenses." Management determined that no assets met the impairment criteria as of December 28, 2019.  The results of impairment tests are subject to management’s estimates and assumptions of projected cash flows and operating results. The Company believes that, based on current conditions, materially different reported results are not likely to result from long-lived asset impairments. However, a change in assumptions or market conditions could result in a change in estimated future cash flows and the likelihood of materially different reported results.
Self-Insurance [Policy Text Block]	(m) Self-Insurance The Company is self-insured for a majority of its workers’ compensation, general liability, vehicle accident and associate medical benefit claims. The self-insurance liability for most of the medical benefit claims is determined based on historical data and an estimate of claims incurred but not reported. The other self-insurance liabilities including workers’ compensation are determined actuarially, based on claims filed and an estimate of claims incurred but not yet reported. The Company is self-insured for certain healthcare claims and stop-loss coverage is maintained for occurrences exceeding a $500 thousand specific deductible with a $250 thousand aggregating deductible. The Company is liable for workers' compensation claims up to $2.0 million per claim . Property and casualty insurance coverage is maintained with outside carriers at deductible or retention levels ranging from $100 thousand to $1.0 million . Significant assumptions used in the development of the actuarial estimates include reliance on the Company’s historical claims data including average monthly claims and average lag time between incurrence and reporting of the claim .
Income Taxes [Policy Text Block]	(n) Income Taxes The Company recognizes deferred tax assets and liabilities for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The Company reviews the tax positions taken or expected to be taken on tax returns to determine whether and to what extent a benefit can be recognized in the Consolidated Financial Statements. Refer to Note 10 to the Consolidated Financial Statements for the amount of unrecognized tax benefits and other disclosures related to uncertain tax positions. To the extent interest and penalties would be assessed by taxing authorities on any underpayment of income tax, such amounts are accrued and classified as a component of income tax expense.
Earnings Per Share [Policy Text Block]	(o) Earnings Per Share Earnings per share are based on the weighted-average number of common shares outstanding.
Revenue Recognition [Policy Text Block]	(p) Revenue Recognition Revenue from the sale of products to the Company’s customers is recognized at the point of sale. Discounts provided to customers at the point of sale through the Weis Club Preferred Shopper loyalty program are recognized as a reduction in sales as products are sold. Periodically, the Company will run a point-based sales incentive program that rewards customers with future sales discounts. The Company makes reasonable and reliable estimates of the amount of future discounts based upon historical experience and its customer data tracking software. Sales are reduced rationally and systematically by these estimates over the life of the program. Discounts to customers at the point of sale provided by vendors, usually in the form of paper coupons, are not recognized as a reduction in sales provided the discounts are redeemable at any retailer that accepts those discounts. The Company records “Deferred revenue” for the sale of gift cards and revenue is recognized in “Net sales” at the time of customer redemption for products. Gift card breakage income is recognized in “Operating, general and administrative expenses” based upon historical redemption patterns and represents the balance of gift cards for which the Company believes the likelihood of redemption by the customer is remote. Sales tax is excluded from “Net sales.” The Company charges sales tax on all taxable customer purchases and remits these taxes monthly to the appropriate taxing jurisdiction. Merchandise return activity is immaterial to revenues due to products being returned quickly and the relatively low unit cost. 
Cost of Sales, Including Advertising, Warehousing and Distribution Expenses [Policy Text Block]	(q) Cost of Sales, Including Advertising, Warehousing and Distribution Expenses “Cost of sales, including advertising, warehousing and distribution expenses” consists of direct product costs (net of discounts and allowances), advertising (net of vendor paid cooperative advertising credits), distribution center and transportation costs, as well as manufacturing facility operations. Advertising costs, net of vendor paid cooperative advertising credits, are expensed as incurred which are primarily funded by vendor cooperative advertising credits and occur in the same period as the product is sold.
Vendor Allowances [Policy Text Block]	(r) Vendor Allowances Vendor allowances related to the Company's buying and merchandising activities are recorded as a reduction of cost of sales as they are earned, in accordance with the underlying agreement. Off-invoice and bill-back allowances are used to reduce direct product costs upon the receipt of goods. Promotional rebates and credits are accounted for as a reduction in the cost of inventory and recognized when the related inventory is sold. Volume incentive discounts are realized as a reduction of cost of sales at the time it is deemed probable and reasonably estimable that the incentive target will be reached. Long-term contract incentives, which require an exclusive vendor relationship, are allocated over the life of the contract. Promotional allowance funds for specific vendor-sponsored programs are recognized as a reduction of cost of sales as the program occurs and the funds are earned per the agreement. Cash discounts for prompt payment of invoices are realized in cost of sales as invoices are paid. Warehouse and back-haul allowances provided by suppliers for distributing their product through the Company’s distribution system are recorded in cost of sales offsetting costs incurred. Warehouse slotting allowances are recorded in cost of sales when new items are initially set up in the Company's distribution system, which is when the related expenses are incurred and performance under the agreement is complete. Swell allowances for damaged goods are realized in cost of sales as provided by the supplier, helping to offset product shrink losses also recorded in cost of sales.  Vendor allowances recorded as credits in cost of sales totaled $130.4 million in 2019 , $ 132.0 million in 2018 and $131.1 million in 2017 . Vendor paid cooperative advertising credits totaled $24.8 million in 2019 , $ 19.4 million in 2018 and $19.2 million in 2017 . These credits were netted against advertising costs within “Cost of Sales, including Advertising, Warehousing and Distribution expenses.” The Company had accounts receivable due from vendors of $1.0 million and $1.6 million for earned advertising credits and $9.5 million and $12.8 million for earned promotional discounts as of December 28, 2019 and December 29, 2018 , respectively. The Company had $5.4 million and $7.4 million in unearned income included in accrued liabilities for unearned vendor programs under long-term contracts for display and shelf space allocation as of December 28, 2019 and December 29, 2018 , respectively.
Operating, General and Administrative Expenses [Policy Text Block]	 (s) Operating, General and Administrative Expenses Business operating costs including expenses generated from administration and purchasing functions, are recorded in “Operating, general and administrative expenses” in the Consolidated Statements of Income. Business operating costs include items such as wages, benefits, utilities, repairs and maintenance, rent, insurance, depreciation, leasehold amortization and costs for outside provided services.
Advertising Costs [Policy Text Block]	(t) Advertising Costs The Company expenses advertising costs as incurred. The Company recorded advertising expense, before vendor paid cooperative advertising credits, of $30.3 million in 2019 , $30 .5 million in 2018 and $31.0 million in 2017 in “Cost of Sales, including Advertising, Warehousing and Distribution Expenses.”
Rental and Commission Income [Policy Text Block]	(u) Rental and Commission Income The Company leases or subleases space to tenants in owned, vacated and open store facilities. Rental income is recorded when earned as a component of “Operating, general and administrative expenses.” All leases are operating leases, as disclosed in Note 5.  The Company provides a variety of services to its customers, including but not limited to lottery, money orders, third-party gift cards, and third-party bill pay services. Commission income earned from these services are recorded when earned as a component of “Operating, general and administrative expenses.”
Current Relevant Accounting Standards	(v) Current Relevant Accounting Standards The Company adopted ASU 2016-02 Leases (Topic 842) effective December 30, 2018. The ASU requires lessees to recognize assets and liabilities for the rights and obligations created by their leases with lease terms geater than 12 months. During 2018, the ASU was amended to permit the election of transitional provisions, including the el i mination of the requirement to restate reporting periods prior to the date of adoption. The Company has adopted the standard using transitional provisions and has elected practical expedients to not reassess the original conclusions reached regarding lease identification, lease classification and initial direct costs. The adoption had a significant impact on the Company’s Consolidated Balance Sheets, resulting in $202 million and $211 million of the operating lease right-to-use assets and lease liabilities, respectively. There are no significant changes to the Consolidated Statements of Comprehensive Income or Consolidated Statements of Cash Flows. See Note 5 for additional disclosures on the adoption. 

Summary Of Significant Accoun_3

Summary Of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 28, 2019
Summary Of Significant Accounting Policies [Abstract]
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets	The Company’s intangible assets and related accumulated amortization at December 28, 2019 and December 29, 2018 consisted of the following:     December 28, 2019 December 29, 2018  Accumulated Accumulated  (dollars in thousands) Gross Amortization Net Gross Amortization Net  Liquor licenses $ 14,905 $ - $ 14,905 $ 14,226 $ - $ 14,226  Asset acquisitions and other 5,083 2,888 2,195 11,870 4,975 6,895  Total $ 19,988 $ 2,888 $ 17,100 $ 26,096 $ 4,975 $ 21,121 

Marketable Securities (Tables)

Marketable Securities (Tables)	12 Months Ended
	Dec. 28, 2019
Marketable Securities [Abstract]
Schedule Of Marketable Securities	 Marketable securities, as of December 28, 2019 and December 29, 2018 , consisted of:     Gross Gross  (dollars in thousands) Amortized Unrealized Unrealized Fair  December 28, 2019 Cost Holding Gains Holding Losses Value  Available-for-sale:  Level 1  Equity securities $ 9,201  Level 2  Municipal bonds $ 52,264 $ 2,091 $ (18) 54,337  $ 52,264 $ 2,091 $ (18) $ 63,538      Gross Gross  (dollars in thousands) Amortized Unrealized Unrealized Fair  December 29, 2018 Cost Holding Gains Holding Losses Value  Available-for-sale:  Level 1  Equity securities $ 7,226  Level 2  Municipal bonds $ 46,699 $ 426 $ (53) 47,072  $ 46,699 $ 426 $ (53) $ 54,298 
Schedule Of Maturities Of Marketable Securities	Maturities of marketable securities classified as available-for-sale at December 28, 2019 , were as follows:    Amortized Fair  (dollars in thousands) Cost Value  Available-for-sale:  Due within one year $ 4,666 $ 4,678  Due after one year through five years 28,773 29,535  Due after five years through ten years 18,825 20,124  $ 52,264 $ 54,337 

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 28, 2019
Inventories [Abstract]
Merchandise Inventories	Merchandise inventories, as of December 28, 2019 and December 29, 2018 , were valued as follows:     (dollars in thousands) 2019 2018  LIFO $ 204,043 $ 211,911  Average cost 75,763 68,845  $ 279,806 $ 280,756 

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Dec. 28, 2019
Property and Equipment [Abstract]
Schedule Of Property, Plant And Equipment	Property and equipment, as of December 28, 2019 and December 29, 2018 , consisted of:     Useful Life  (dollars in thousands) ( in years) 2019 2018  Land $ 137,977 $ 133,386  Buildings and improvements 10 - 60 736,812 713,128  Equipment 3 - 12 1,096,252 1,069,616  Leasehold improvements 5 - 20 217,664 224,231  Total, at cost 2,188,705 2,140,361  Less accumulated depreciation and amortization 1,301,777 1,252,753  $ 886,928 $ 887,608 

Lease Commitments (Tables)

Lease Commitments (Tables)	12 Months Ended
	Dec. 28, 2019
Lease Commitments [Abstract]
Schedule Of Lease Costs	  (dollars in thousands) 2019  Operating lease cost $ 46,063  Variable lease cost 10,998  Lease or sublease income (7,749)  Net lease cost $ 49,312 
Schedule Of Future Minimum Rental Payments	  (dollars in thousands) Leases Subleases  2020 $ 47,184 (4,044)  2021 42,607 (3,480)  2022 35,845 (2,901)  2023 31,063 (2,308)  2024 26,256 (1,663)  Thereafter 75,622 (6,336)  Total Lease Payments $ 258,577 (20,732)  Less: Interest 39,809 -  Present value of lease liabilities 218,768 (20,732) 
Schedule Of Operating Lease Information	  Lease Term and Discount Rate December 28, 2019 December 30, 2018  Weighted-average remaining lease term 4.44 4.69  Weighted-average discount rate 3.47% 3.84% 
Schedule Of Rent Expense	  (dollars in thousands) 2018 2017  Minimum annual rentals $ 47,253 $ 46,804  Contingent rentals 419 432  Lease or sublease income (7,757) (7,612)  $ 39,915 $ 39,624 

Retirement Plans (Tables)

Retirement Plans (Tables)	12 Months Ended
	Dec. 28, 2019
Retirement Plans [Abstract]
Schedule of Costs of Retirement Plans	   (dollars in thousands) 2019 2018 2017  Retirement savings plan 3,434 3,525 3,343  Deferred compensation plan 801 508 813  Supplemental executive retirement plan 498 390 531  $ 4,733 $ 4,423 $ 4,687 

Revenue Recognition (Tables)

Revenue Recognition (Tables)	12 Months Ended
	Dec. 28, 2019
Revenue Recognition [Abstract]
Schedule Of Sales By Type Of Product	  52 Weeks Ended  ( dollars in thousands ) December 28, 2019 December 29, 2018 December 30, 2017  Grocery $ 3,068,754 86.6 % $ 3,063,218 87.3 % $ 3,041,481 87.7 %  Pharmacy 337,233 9.5 314,584 9.0 309,079 8.9  Fuel 127,828 3.6 125,993 3.6 109,467 3.2  Manufacturing 9,484 0.3 5,475 0.1 6,780 0.2   Total net sales $ 3,543,299 100.0 % $ 3,509,270 100.0 % $ 3,466,807 100.0 % 

Prior Year Reclassifications (T

Prior Year Reclassifications (Tables)	12 Months Ended
	Dec. 28, 2019
Prior Year Reclassifications [Abstract]
Summary Of Effect Of Reclassifications	  December 29, 2018 December 30, 2017  Consolidated Statements of Income As Previously As Previously  (dollars in thousands) Reported Reclassifications As Adjusted Reported Reclassifications As Adjusted  Operating, general and administrative expenses $ 851,411 $ 919 $ 852,330 $ 836,098 $ (2,094) $ 834,004  Income from operations 83,590 (919) 82,671 76,425 2,094 78,519  Other income (expense) - 919 919 - (2,094) (2,094) 

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 28, 2019
Accumulated Other Comprehensive Income [Abstract]
Schedule of Accumulated Other Comprehensive Income	   Unrealized Gains  on Available-for-Sale  (dollars in thousands) Marketable Securities  Accumulated other comprehensive income balance as of December 30, 2017 $ 5,880   Amount reclassified to retained earnings for equity unrealized gain (adoption of ASU 2016-01) (5,481)  Other comprehensive loss before reclassifications (177)  Amounts reclassified from accumulated other comprehensive income 40  Net current period other comprehensive Income (5,618)  Accumulated other comprehensive income balance as of December 29, 2018 $ 262   Other comprehensive income before reclassifications 1,255  Amounts reclassified from accumulated other comprehensive income (37)  Net current period change in other comprehensive income 1,218  Accumulated other comprehensive income balance as of December 28, 2019 $ 1,480 
Schedule Of Reclassifications out of Accumulated Other Comprehensive Income	   Amounts Reclassified from  Accumulated Other Comprehensive Income to the  Consolidated Statements of Income  (dollars in thousands) Location 2019 2018 2017  Unrealized gains (losses) on available-for-sale marketable securities  Investment income and interest expense $ (51) $ (54) $ (40)  Provision for income taxes 14 14 11  Total amount reclassified, net of tax $ (37) $ (40) $ (29) 

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 28, 2019
Income Taxes [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	   (dollars in thousands) 2019 2018 2017  Current:  Federal $ 11,779 $ 11,385 $ 10,630  State 3,117 4,594 1,972  Deferred:  Federal 6,636 6,059 (34,659)  State (871) (2,640) 2,666  $ 20,661 $ 19,398 $ (19,391) 
Schedule of Effective Income Tax Rate Reconciliation	   (dollars in thousands) 2019 2018 2017  Income taxes at federal statutory rate $ 18,615 $ 17,249 $ 27,658  State income taxes, net of federal income tax benefit 1,333 639 1,306  Nondeductible employee-related expenses 1,974 768 1,828  2017 tax reform - 657 (49,336)  Other (1,261) 85 (847)  Provision for income taxes (effective tax rate 23.3% , 23.6% and (24.5)% , respectively) $ 20,661 $ 19,398 $ (19,391) 
Schedule of Deferred Tax Assets and Liabilities	   (dollars in thousands) 2019 2018  Deferred tax assets:  Accounts receivable $ 749 $ 588  Compensated absences - 355  Employment incentives 1,405 842  Employee benefit plans 4,853 4,914  General liability insurance 2,778 2,702  Postretirement benefit obligations 5,767 5,272  Net operating loss carryforwards 6,582 8,030  Other 8,136 7,967  Total deferred tax assets 30,270 30,670  Deferred tax liabilities:  Inventories (13,072) (9,828)  Unrealized gains on marketable securities (2,851) (1,809)  Nondeductible accruals and other (5,252) (5,274)  Depreciation (106,136) (104,552)  Total deferred tax liabilities (127,311) (121,463)  Net deferred tax liability $ (97,041) $ (90,793) 
Schedule of Unrecognized Tax Benefits	   (dollars in thousands) 2019 2018  Unrecognized tax benefits at beginning of year $ 6,405 $ 4,691  Increases based on tax positions related to the current year 1,769 1,714  Additions for tax positions of prior year - -  Reductions for tax positions of prior years - -  Settlements - -  Expiration of the statute of limitations for assessment of taxes (1,562) -  Unrecognized tax benefits at end of year $ 6,612 $ 6,405 

Summary of Quarterly Results (T

Summary of Quarterly Results (Tables)	12 Months Ended
	Dec. 28, 2019
Summary of Quarterly Results [Abstract]
Quarterly Financial Information	   (dollars in thousands, except per share amounts) Thirteen Weeks Ended  March 30, 2019 June 29, 2019 September 28, 2019 December 28, 2019  Net sales $ 876,718 $ 887,967 $ 876,222 $ 902,392  Gross profit on sales 229,552 236,670 232,825 239,147  Net income 14,304 20,475 14,319 18,885  Basic and diluted earnings per share $ .53 $ .76 $ .53 $ .70      (dollars in thousands, except per share amounts) Thirteen Weeks Ended  March 31, 2018 June 30, 2018 September 29, 2018 December 29, 2018  Net sales $ 876,106 $ 871,100 $ 869,076 $ 892,988  Gross profit on sales 234,907 240,295 232,340 227,459  Net income 16,191 19,095 14,207 13,245  Basic and diluted earnings per share $ .60 $ .71 $ .53 $ .49   

Summary Of Significant Accoun_4

Summary Of Significant Accounting Policies (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 28, 2019USD ($)segment	Dec. 29, 2018USD ($)	Dec. 30, 2017USD ($)
Significant Accounting Policies [Line Items]
Number of reportable segments | segment	1
Fiscal Period Duration	364 days	364 days	364 days
Unrealized gain (loss) on equity securities	$ 1,975	$ (1,606)	$ 0
Accounts Receivable, Allowance for Credit Loss	$ 2,800	2,100
Percentage of facilities under operating lease	52.00%
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 455
Finite-Lived Intangible Assets, Amortization Expense, Year Two	444
Finite-Lived Intangible Assets, Amortization Expense, Year Three	314
Finite-Lived Intangible Assets, Amortization Expense, Year Four	310
Finite-Lived Intangible Assets, Amortization Expense, Year Five	310
Impairment of Long-Lived Assets Held-for-use	0	1,532	0
Self Insurance, Annual Maximum of Health Claims Liability per Associate	500
Self Insurance, Maximum of Workers Compensation Claims Liability per Associate per Claim	2,000
Stop loss insurance aggregating deductible	250
Cost of Goods Sold, Vendor Allowances	130,400	132,000	131,100
Vendor Paid Cooperative Advertising Credits	24,800	19,400	19,200
Accounts Receivable, Earned Advertising Credits	1,000	1,600
Accounts Receivable, Earned Promotional Discounts	9,500	12,800
Unearned Income for Vendor Programs	5,400	7,400
Advertising Expense	30,300	30,500	$ 31,000
Operating lease right-to-use	210,196	0
Operating lease liability	218,768
Investments [Member]
Significant Accounting Policies [Line Items]
Cash Equivalents, at Carrying Value	32,900	5,400
Consumer Electronic Payments [Member]
Significant Accounting Policies [Line Items]
Cash Equivalents, at Carrying Value	$ 23,100	23,600
Accounting Standards Update 2016-02 [Member]
Significant Accounting Policies [Line Items]
Operating lease right-to-use		202,000
Operating lease liability		$ 211,000
Maximum [Member]
Significant Accounting Policies [Line Items]
Lease renewal term	20 years
Property and Casualty Insurance, Deductible	$ 1,000
Minimum [Member]
Significant Accounting Policies [Line Items]
Lease renewal term	5 years
Property and Casualty Insurance, Deductible	$ 100
Customer Lists [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years

Summary Of Significant Accoun_5

Summary Of Significant Accounting Policies (Schedule of Finite-Lived and Indefinite-Lived Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	$ 2,888	$ 4,975
Intangible Assets, Gross (Excluding Goodwill)	19,988	26,096
Intangible Assets, Net (Excluding Goodwill)	17,100	21,121
Liquor Licenses [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets (Excluding Goodwill)	14,905	14,226
Asset Acquisitions And Other [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	5,083	11,870
Finite-Lived Intangible Assets, Accumulated Amortization	2,888	4,975
Finite-Lived Intangible Assets, Net	$ 2,195	$ 6,895

Marketable Securities (Narrativ

Marketable Securities (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Marketable Securities [Abstract]
Investment income (loss)	$ 7,100	$ 1,200
Unrealized gain (loss) on equity securities	$ 1,975	$ (1,606)	$ 0

Marketable Securities (Schedule

Marketable Securities (Schedule Of Marketable Securities) (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 52,264	$ 46,699
Gross Unrealized Holding Gains	2,091	426
Gross Unrealized Holding Losses	(18)	(53)
Fair Value	54,337
Fair value	63,538	54,298
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Debt Securities, Available-for-sale [Line Items]
Equity securities, Fair Value	9,201	7,226
Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	52,264	46,699
Gross Unrealized Holding Gains	2,091	426
Gross Unrealized Holding Losses	(18)	(53)
Fair Value	$ 54,337	$ 47,072

Marketable Securities (Schedu_2

Marketable Securities (Schedule Of Maturities of Marketable Securities) (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Marketable Securities [Abstract]
Amortized Cost, Due within one year	$ 4,666
Amortized Cost, Due after one year through five years	28,773
Amortized Cost, Due after five years through ten years	18,825
Amortized Cost	52,264	$ 46,699
Fair Value, Due within one year	4,678
Fair Value, Due after one year through five years	29,535
Fair Value, Due after five years through ten years	20,124
Fair Value	$ 54,337

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Inventories [Abstract]
LIFO	$ 204,043	$ 211,911
Average Cost	75,763	68,845
Inventories	279,806	280,756
Excess of Replacement or Current Costs over Stated LIFO Value	$ 70,700	$ 76,500

Property and Equipment (Schedul

Property and Equipment (Schedule Of Property, Plant And Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 2,188,705	$ 2,140,361
Less accumulated depreciation and amortization	1,301,777	1,252,753
Property and equipment, net	886,928	887,608
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	137,977	133,386
Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	736,812	713,128
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	1,096,252	1,069,616
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 217,664	$ 224,231
Minimum [Member] | Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	10 years
Minimum [Member] | Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Minimum [Member] | Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Maximum [Member] | Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	60 years
Maximum [Member] | Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	12 years
Maximum [Member] | Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	20 years

Lease Commitments (Narrative) (

Lease Commitments (Narrative) (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Operating Leased Assets [Line Items]
Operating lease right-to-use	$ 210,196	$ 0
Operating lease liability	$ 218,768
Percentage of facilities under operating lease	52.00%
Maximum [Member]
Operating Leased Assets [Line Items]
Lease renewal term	20 years
Minimum [Member]
Operating Leased Assets [Line Items]
Lease renewal term	5 years
Accounting Standards Update 2016-02 [Member]
Operating Leased Assets [Line Items]
Operating lease right-to-use		202,000
Operating lease liability		$ 211,000

Lease Commitments (Schedule Of

Lease Commitments (Schedule Of Lease Costs) (Details) $ in Thousands	12 Months Ended
	Dec. 28, 2019USD ($)
Lease Commitments [Abstract]
Operating lease cost	$ 46,063
Variable lease cost	10,998
Lease or sublease income	(7,749)
Net lease cost	$ 49,312

Lease Commitments (Schedule O_2

Lease Commitments (Schedule Of Future Minimum Rental Payments) (Details) $ in Thousands	Dec. 28, 2019USD ($)
Leases
2020	$ 47,184
2021	42,607
2022	35,845
2023	31,063
2024	26,256
Thereafter	75,622
Total Lease Payments	258,577
Less: Interest	39,809
Present value of lease liabilities	218,768
Subleases [Abstract]
2020	(4,044)
2021	(3,480)
2022	(2,901)
2023	(2,308)
2024	(1,663)
Thereafter	(6,336)
Total Lease Payments	(20,732)
Present value of lease liabilities	$ (20,732)

Lease Commitments (Schedule O_3

Lease Commitments (Schedule Of Operating Lease Information) (Details)	Dec. 28, 2019	Dec. 29, 2018
Lease Commitments [Abstract]
Weighted-average remaining lease term	4 years 5 months 9 days	4 years 8 months 9 days
Weighted-average discount rate	3.47%	3.84%

Lease Commitments (Schedule O_4

Lease Commitments (Schedule Of Rent Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Lease Commitments [Abstract]
Minimum annual rentals	$ 47,253	$ 46,804
Contingent rentals	419	432
Lease or sublease income	(7,757)	(7,612)
Rent expense	$ 39,915	$ 39,624

Retirement Plans (Narrative) (D

Retirement Plans (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 28, 2019USD ($)	Dec. 29, 2018USD ($)
Retirement Plans [Abstract]
Number of supplemental retirement plans	1
Defined Benefit Plan, Benefit Obligation	$ 4.2
Retirement Plans, Accumulated Benefit Obligation	$ 19	$ 14.7
Service period to be fully vested	3 years
Estimated payments in next year	$ 1

Retirement Plans (Schedule Of C

Retirement Plans (Schedule Of Costs Of Retirement Plan) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Pension Cost (Reversal of Cost)	$ 4,733	$ 4,423	$ 4,687
Retirement savings plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension Cost (Reversal of Cost)	3,434	3,525	3,343
Deferred compensation plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension Cost (Reversal of Cost)	801	508	813
Supplemental executive retirement plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension Cost (Reversal of Cost)	$ 498	$ 390	$ 531

Revenue Recognition (Schedule O

Revenue Recognition (Schedule Of Sales By Type Of Product) (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 28, 2019USD ($)	Sep. 28, 2019USD ($)	Jun. 29, 2019USD ($)	Mar. 30, 2019USD ($)	Dec. 29, 2018USD ($)	Sep. 29, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 28, 2019USD ($)segment	Dec. 29, 2018USD ($)	Dec. 30, 2017USD ($)
Disaggregation of Revenue [Line Items]
Number of reportable segments | segment									1
Total net sales	$ 902,392	$ 876,222	$ 887,967	$ 876,718	$ 892,988	$ 869,076	$ 871,100	$ 876,106	$ 3,543,299	$ 3,509,270	$ 3,466,807
Revenue Benchmark [Member] | Product Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration percent									100.00%	100.00%	100.00%
Grocery [Member] | Revenue Benchmark [Member] | Product Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Total net sales									$ 3,068,754	$ 3,063,218	$ 3,041,481
Concentration percent									86.60%	87.30%	87.70%
Pharmacy [Member] | Revenue Benchmark [Member] | Product Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Total net sales									$ 337,233	$ 314,584	$ 309,079
Concentration percent									9.50%	9.00%	8.90%
Fuel [Member] | Revenue Benchmark [Member] | Product Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Total net sales									$ 127,828	$ 125,993	$ 109,467
Concentration percent									3.60%	3.60%	3.20%
Manufacturing [Member] | Revenue Benchmark [Member] | Product Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Total net sales									$ 9,484	$ 5,475	$ 6,780
Concentration percent									0.30%	0.10%	0.20%

Prior Year Reclassifications (N

Prior Year Reclassifications (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other income (expense)	$ 3,049	$ (919)	$ 2,094
Reclassifications [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other income (expense)	$ 3,000	$ (919)	$ 2,094

Prior Year Reclassifications (S

Prior Year Reclassifications (Summary Of Effect Of Reclassifications) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Operating, general and administrative expenses	$ 853,555	$ 852,330	$ 834,004
Income from operations	84,639	82,671	78,519
Other income (expense)	(3,049)	919	(2,094)
As Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Operating, general and administrative expenses		851,411	836,098
Income from operations		83,590	76,425
Reclassifications [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Operating, general and administrative expenses		919	(2,094)
Income from operations		(919)	2,094
Other income (expense)	$ (3,000)	$ 919	$ (2,094)

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Schedule Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount reclassified to retained earnings for equity unrealized gain (adoption of ASU 2016-01)		$ 0	$ 0
Unrealized Gains On Available-For-Sale Marketable Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income balance, beginning balance	$ 262	5,880
Amount reclassified to retained earnings for equity unrealized gain (adoption of ASU 2016-01)		(5,481)
Other comprehensive income (loss) before reclassifications	1,255	(177)
Amounts reclassified from accumulated other comprehensive income	(37)	40
Net current period change in other comprehensive income	1,218	(5,618)
Accumulated other comprehensive income balance, ending balance	$ 1,480	$ 262

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Schedule Of Reclassifications out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment income and interest expense									$ 7,054	$ (1,454)	$ 2,598
Provision for income taxes									(20,661)	(19,398)	19,391
Net income	$ 18,885	$ 14,319	$ 20,475	$ 14,304	$ 13,245	$ 14,207	$ 19,095	$ 16,191	67,983	62,738	98,414
Unrealized Gains On Available-For-Sale Marketable Securities [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment income and interest expense									(51)	(54)	(40)
Provision for income taxes									14	14	11
Net income									$ (37)	$ (40)	$ (29)

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 31, 2018	Dec. 29, 2018	Dec. 30, 2017
Income Taxes [Line Items]
Federal tax rate	21.00%	21.00%	21.00%	35.00%
Effective tax rate	23.30%		23.60%	(24.50%)
2017 tax reform			$ 657	$ (49,336)
Unrecognized tax benefits that would impact effective tax rate	$ 1,800		1,700	1,600
Earliest Tax Year [Member] | PENNSYLVANIA
Income Taxes [Line Items]
Open Tax Year	2016
Latest Tax Year [Member] | PENNSYLVANIA
Income Taxes [Line Items]
Open Tax Year	2019
Federal [Member]
Income Taxes [Line Items]
Income Taxes Paid	$ 11,300		4,500	12,000
State [Member]
Income Taxes [Line Items]
Income Taxes Paid	2,800		$ 2,100	$ 1,000
Operating Loss Carryforwards	$ 83,400
Operating Loss Carryforwards, Expiration Date	Jan. 1, 2027

Income Taxes (Schedule of Compo

Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Income Taxes [Abstract]
Current, Federal	$ 11,779	$ 11,385	$ 10,630
Current, State	3,117	4,594	1,972
Deferred, Federal	6,636	6,059	(34,659)
Deferred, State	(871)	(2,640)	2,666
Provision for income taxes	$ 20,661	$ 19,398	$ (19,391)

Income Taxes (Schedule of Effec

Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Income Taxes [Abstract]
Income taxes at federal statutory rate	$ 18,615	$ 17,249	$ 27,658
State income taxes, net of federal income tax benefit	1,333	639	1,306
Nondeductible employee-related expenses	1,974	768	1,828
2017 tax reform		657	(49,336)
Other	(1,261)	85	(847)
Provision for income taxes	$ 20,661	$ 19,398	$ (19,391)
Effective tax rate	23.30%	23.60%	(24.50%)

Income Taxes (Schedule of Defer

Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Income Taxes [Abstract]
Accounts receivable	$ 749	$ 588
Compensated absences	0	355
Employment incentives	1,405	842
Employee benefit plans	4,853	4,914
General liability insurance	2,778	2,702
Postretirement benefit obligations	5,767	5,272
Net operating loss carryforwards	6,582	8,030
Other	8,136	7,967
Total deferred tax assets	30,270	30,670
Inventories	(13,072)	(9,828)
Unrealized gains on marketable securities	(2,851)	(1,809)
Nondeductible accruals and other	(5,252)	(5,274)
Depreciation	(106,136)	(104,552)
Total deferred tax liabilities	(127,311)	(121,463)
Net deferred tax liability	$ (97,041)	$ (90,793)

Income Taxes (Schedule of Unrec

Income Taxes (Schedule of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Income Taxes [Abstract]
Unrecognized tax benefits at beginning of year	$ 6,405	$ 4,691
Increases based on tax positions related to the current year	1,769	1,714
Additions for tax positions of prior year	0	0
Reductions for tax positions of prior years	0	0
Settlements	0	0
Expiration of the statute of limitations for assessment of taxes	(1,562)	0
Unrecognized tax benefits at end of year	$ 6,612	$ 6,405

Summary of Quarterly Results (D

Summary of Quarterly Results (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Summary of Quarterly Results [Abstract]
Net sales	$ 902,392	$ 876,222	$ 887,967	$ 876,718	$ 892,988	$ 869,076	$ 871,100	$ 876,106	$ 3,543,299	$ 3,509,270	$ 3,466,807
Gross profit on sales	239,147	232,825	236,670	229,552	227,459	232,340	240,295	234,907	938,194	935,001	912,523
Net income	$ 18,885	$ 14,319	$ 20,475	$ 14,304	$ 13,245	$ 14,207	$ 19,095	$ 16,191	$ 67,983	$ 62,738	$ 98,414
Basic and diluted earnings per share	$ 0.70	$ 0.53	$ 0.76	$ 0.53	$ 0.49	$ 0.53	$ 0.71	$ 0.60	$ 2.53	$ 2.33	$ 3.66

Long-Term Debt (Details)

Long-Term Debt (Details) - USD ($)	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Line of Credit Facility [Line Items]
Interest Expense, Debt	$ 55,000	$ 288,000
Revolving Credit Facility [Member] | Wells Fargo Bank, N.A. [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	30,000,000
Line of Credit Facility, Remaining Borrowing Capacity	18,800,000
Line of Credit [Member] | Wells Fargo Bank, N.A. [Member]
Line of Credit Facility [Line Items]
Line of credit facility, discretionary amount available	70,000,000
Letter of Credit [Member] | Wells Fargo Bank, N.A. [Member]
Line of Credit Facility [Line Items]
Amount of facility borrowed	$ 11,200,000

Valuation and Qualifying Acco_2

Valuation and Qualifying Accounts (Details) - Allowance For Uncollectible Accounts [Member] - USD ($) $ in Thousands		12 Months Ended
		Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		$ 2,090	$ 1,946	$ 1,455
Charged to Costs and Expenses		1,975	1,144	2,176
Charged to Accounts
Deductions	[1]	1,308	1,000	1,685
Balance at End of Period		$ 2,757	$ 2,090	$ 1,946
[1]	Deductions are uncollectible accounts written off, net of recoveries.