XML 16 R1.htm IDEA: XBRL DOCUMENT v3.25.0.1
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 28, 2024
Feb. 26, 2025
Jun. 29, 2024
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 28, 2024    
Document Transition Report false    
Securities Act 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    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Title of 12(b) Security Common stock, no par value    
Trading Symbol WMK    
Security Exchange Name NYSE    
Entity Common Stock, Shares Outstanding   26,898,443  
Entity Central Index Key 0000105418    
Current Fiscal Year End Date --12-28    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Document Financial Statement Error Correction [Flag] false    
ICFR Auditor Attestation Flag true    
Entity Public Float     $ 593,000,000
Documents Incorporated by Reference [Text Block]

DOCUMENTS INCORPORATED BY REFERENCE: Selected portions of the 2025 Weis Markets, Inc. definitive proxy statement are incorporated herein by reference.

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Auditor Name RSM US LLP    
Auditor Firm ID 49    
Auditor Location Philadelphia, Pennsylvania