XML 78 R63.htm IDEA: XBRL DOCUMENT
v3.25.4

Shareholders' and Member's Equity - Schedule of Cancellations of Share (Details) - shares | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2025
Class B Shares | LandBridge |  |  |  |
Shareholders' and Member's Equity [Line Items] |  |  |  |
Number of opco units cancelled | 119,987 | 79,686 | 34,674 | 234,347

X
- Definition Number of opco units cancelled. + References No definition available. + Details
Name: | lb_NumberOfOpcoUnitsCancelled
Namespace Prefix: | lb_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Shareholder's and Member's Equity. + References No definition available. + Details
Name: | lb_ShareholdersAndMembersEquityLineItems
Namespace Prefix: | lb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=lb_LandbridgeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |