XML 15 R1.htm IDEA: XBRL DOCUMENT v3.20.4
Cover Page - USD ($)
$ in Billions
12 Months Ended
Dec. 31, 2020
Feb. 23, 2021
Jun. 30, 2020
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
Document Transition Report false    
Entity File Number 001-36126    
Entity Registrant Name LGI HOMES, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 46-3088013    
Entity Address, Address Line One 1450 Lake Robbins Drive,    
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 Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Emerging Growth Company false    
Entity Small Business false    
Entity Shell Company false    
Entity Filer Category Large Accelerated Filer    
ICFR Auditor Attestation Flag true    
Entity Public Float     $ 2.0
Entity Common Stock, Shares Outstanding   24,983,561  
Documents Incorporated by Reference Portions from the registrant’s definitive Proxy Statement for the 2021 Annual Meeting of Stockholders are incorporated herein by reference (to the extent indicated) into Part III.    
Entity Central Index Key 0001580670    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Amendment Flag false