v3.26.1
Document and Entity Information - shares
 3 Months Ended
Mar. 31, 2026
May 06, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Mar. 31, 2026  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Current Fiscal Year End Date --12-31  
Amendment Flag false  
Entity Central Index Key 0001995807  
Entity Registrant Name LandBridge Company LLC  
Entity File Number 001-42150  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 93-3636146  
Entity Address, Address Line One 5555 San Felipe Street  
Entity Address, Address Line Two Suite 1200  
Entity Address, City or Town Houston  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 77056  
City Area Code 713  
Local Phone Number 230-8864  
Title of 12(b) Security Class A shares, representing limited liability company interests  
Trading Symbol LB  
Security Exchange Name NYSE  
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  
Class A Shares    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   27,839,229
Class B Shares    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   49,177,775