v3.26.1
Cover Page - shares
3 Months Ended
Mar. 31, 2026
Apr. 24, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Mar. 31, 2026  
Current Fiscal Year End Date --12-31  
Entity Registrant Name LGI HOMES, INC.  
Entity File Number 001-36126  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 46-3088013  
Entity Address, Address Line One 1450 Lake Robbins Drive,  
Entity Address, Address Line Two Suite 430,  
Entity Address, City or Town The Woodlands,  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 77380  
City Area Code (281)  
Local Phone Number 362-8998  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol LGIH  
Security Exchange Name NASDAQ  
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  
Entity Common Stock, Shares Outstanding   23,232,279
Central Index Key 0001580670  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Document Fiscal Year Focus 2026