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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Mar. 31, 2022
Jun. 30, 2021
Document and Entity Information        
Document Type 10-K      
Document Annual Report true      
Document Period End Date Dec. 31, 2021      
Document Transition Report false      
Entity Registrant Name Legacy Housing Corporation      
Entity File Number 001-38761      
Entity Incorporation, State or Country Code TX      
Entity Tax Identification Number 20-2897516      
Entity Address, Address Line One 1600 Airport Freeway      
Entity Address, Address Line Two #100      
Entity Address, City or Town Bedford      
Entity Address, State or Province TX      
Entity Address, Postal Zip Code 76022      
City Area Code 817      
Local Phone Number 799-4900      
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 true      
Entity Emerging Growth Company true      
Entity Ex Transition Period false      
ICFR Auditor Attestation Flag false      
Entity Shell Company false      
Title of 12(b) Security Common Stock ($0.001 par value)      
Trading Symbol LEGH      
Security Exchange Name NASDAQ      
Entity Public Float       $ 133,405,746
Entity Common Stock, Shares Outstanding     24,406,020  
Entity Central Index Key 0001436208      
Current Fiscal Year End Date --12-31      
Document Fiscal Year Focus 2021      
Document Fiscal Period Focus FY      
Amendment Flag false      
Auditor Name Weaver, LLP BKD, LLP    
Auditor Firm ID 410 686    
Auditor Location Dallas, Texas Dallas, Texas