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Shareholders' and Member's Equity - Additional Information (Details) - USD ($)					1 Months Ended	3 Months Ended				12 Months Ended
	Feb. 24, 2026	Nov. 18, 2025	Nov. 12, 2025	May 23, 2025	Dec. 31, 2024	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Shareholders' and Member's Equity [Line Items]
Number of opco units redeemed										4,400,000
Expenses on sale of stock										$ 1,112,000	$ 8,186,000	$ 1,706,000
Share based compensation arrangement by share based payment grant date fair value										53,586,000
LandBridge
Shareholders' and Member's Equity [Line Items]
Number of opco units redeemed		2,500,000		1,900,000
Expenses on sale of stock		$ 800,000
Tax Distributions Paid						$ 3,177,000	$ 7,140,000	$ 16,650,000	$ 5,821,000	$ 32,788,000
Sole Liability
Shareholders' and Member's Equity [Line Items]
Limited liability interests										100.00%
Class A Shares \| LandBridge
Shareholders' and Member's Equity [Line Items]
Number of opco units redeemed		2,500,000		1,900,000
Price per share		$ 70		$ 75.25
Number of consecutive trading days						10 days	10 days	10 days	10 days
Class B Shares
Shareholders' and Member's Equity [Line Items]
Number of opco units redeemed										4,400,000
Share based compensation arrangement by share based payment grant date fair value			$ 53,600,000
Shares converted											0
Class B Shares \| December Private Placement \| LandBridge
Shareholders' and Member's Equity [Line Items]
Number of OpCo units purchesd by private placement					2,498,751
Subsequent Event \| LandBridge
Shareholders' and Member's Equity [Line Items]
Tax Distributions Paid	$ 5,300,000
One Nine One Eight Ranch and Royalty, LLC
Shareholders' and Member's Equity [Line Items]
Number of OpCo units issued as part of purchase consideration			657,411
One Nine One Eight Ranch and Royalty, LLC \| Class B Shares
Shareholders' and Member's Equity [Line Items]
Number of OpCo units issued as part of purchase consideration			657,411
O 2025 Q3 Dividends
Shareholders' and Member's Equity [Line Items]
Dividend payable record date							Sep. 04, 2025
O 2025 Q3 Dividends \| Subsequent Event \| Class A Shares
Shareholders' and Member's Equity [Line Items]
Dividend declared date	Feb. 24, 2026
Dividend declared	$ 0.12
Dividend declared payable date	Mar. 19, 2026
Dividend payable record date	Mar. 05, 2026
Maximum \| Subsequent Event \| Class A Shares
Shareholders' and Member's Equity [Line Items]
Share repurchase program, authorized amount	$ 50,000,000