Shareholder's and Member's Equity.

No definition available.

Name:	lb_ShareholdersAndMembersEquityLineItems
Namespace Prefix:	lb_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Tax distributions paid.

+ References

No definition available.

+ Details

Name:	lb_TaxDistributionsPaid
Namespace Prefix:	lb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Aggregate dividends paid during the period for each share of common stock outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

+ Details

Name:	us-gaap_CommonStockDividendsPerShareCashPaid
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

+ References

+ Details

Name:	us-gaap_DividendsCommonStockCash
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Date the holder must own the stock to be entitled to the dividend, in YYYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_DividendsPayableDateOfRecordDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=lb_OpCoUnitholdersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=lb_LandbridgeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=lb_O2025Q1DividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=lb_O2025Q2DividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=lb_O2025Q3DividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=lb_O2025Q4DividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Shareholders' and Member's Equity - Schedule of Dividends and Distributions (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2025
Class A Shares
Shareholders' and Member's Equity [Line Items]
Dividends paid					$ 10,159
OpCo unitholders
Shareholders' and Member's Equity [Line Items]
Dividends paid					20,489
LandBridge
Shareholders' and Member's Equity [Line Items]
Tax distributions	$ 3,177	$ 7,140	$ 16,650	$ 5,821	$ 32,788
O 2025 Q1 Dividends
Shareholders' and Member's Equity [Line Items]
Date of Record				Mar. 06, 2025
Dividends, rate per share				$ 0.1
O 2025 Q1 Dividends \| Class A Shares
Shareholders' and Member's Equity [Line Items]
Dividends paid				$ 2,326
O 2025 Q1 Dividends \| OpCo unitholders
Shareholders' and Member's Equity [Line Items]
Dividends paid				$ 5,319
O 2025 Q2 Dividends
Shareholders' and Member's Equity [Line Items]
Date of Record			Jun. 05, 2025
Dividends, rate per share			$ 0.1
O 2025 Q2 Dividends \| Class A Shares
Shareholders' and Member's Equity [Line Items]
Dividends paid			$ 2,515
O 2025 Q2 Dividends \| OpCo unitholders
Shareholders' and Member's Equity [Line Items]
Dividends paid			$ 5,124
O 2025 Q3 Dividends
Shareholders' and Member's Equity [Line Items]
Date of Record		Sep. 04, 2025
Dividends, rate per share		$ 0.1
O 2025 Q3 Dividends \| Class A Shares
Shareholders' and Member's Equity [Line Items]
Dividends paid		$ 2,534
O 2025 Q3 Dividends \| OpCo unitholders
Shareholders' and Member's Equity [Line Items]
Dividends paid		$ 5,121
O 2025 Q4 Dividends
Shareholders' and Member's Equity [Line Items]
Date of Record	Dec. 04, 2025
Dividends, rate per share	$ 0.1
O 2025 Q4 Dividends \| Class A Shares
Shareholders' and Member's Equity [Line Items]
Dividends paid	$ 2,784
O 2025 Q4 Dividends \| OpCo unitholders
Shareholders' and Member's Equity [Line Items]
Dividends paid	$ 4,925