Summary of Significant Accounting Policies (Policies)	3 Months Ended
Summary of Significant Accounting Policies (Policies)	Mar. 31, 2026
Significant Accounting Policies [Line Items]
Basis of Presentation and Consolidation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements (the “Financial Statements”) of the Company have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and in accordance with Rule 10-01 of Regulation S-X and reflect all adjustments, consisting of normal recurring adjustments which are, in the opinion of management, necessary for a fair statement of the financial results for the interim periods presented. Accordingly, these Financial Statements should be read in conjunction with the Company’s annual audited financial statements and accompanying notes included in our Annual Report on Form 10-K for the year ended December 31, 2025 (the “2025 Form 10-K”). When necessary, certain reclassifications are made to prior period financial information to conform with current period presentation. All dollar amounts in the Financial Statements and tables in the notes are stated in thousands of dollars unless otherwise indicated. Results of operations for the three months ended March 31, 2026 are not necessarily indicative of the results of operations that will be realized for the year ending December 31, 2026. Consolidation We have determined that the members with equity at risk in OpCo lack the authority, through voting rights or similar rights, to direct the activities that most significantly impact OpCo’s economic performance; therefore, OpCo is considered a variable interest entity. As the managing member of OpCo, we operate and control all of the business and affairs of OpCo and also have the obligation to absorb losses or the right to receive benefits that could be potentially significant to us. Therefore, we are considered the primary beneficiary and consolidate OpCo for accounting purposes. The Financial Statements include the accounts of the Company, OpCo and its wholly owned subsidiaries. All intercompany transactions and balances have been eliminated upon consolidation.
Segment Information	Segment Information The Company operates in a single operating and reportable segment. All of our assets are located in the United States. Accounting Standards Codification (“ASC”) Topic 280, Segment Reporting, defines characteristics of operating segments as being components of an enterprise in which separate discrete financial information is available for evaluation by the chief operating decision maker (“CODM”) in making decisions on how to allocate resources and assess performance. The Company’s one segment approach is consistent with the reporting structure of the Company’s internal organization, as well as with the financial information used by the Company’s CODM. The Company’s CODM is the Chief Executive Officer who allocates resources and assesses performance based upon financial information at the consolidated level. The financial measure regularly provided to the CODM that is most consistent with U.S. GAAP is net income, as presented on our condensed consolidated statements of operations. The measure of segment assets is reported on the condensed consolidated balance sheets as total assets. The Company presents all of its significant segment expenses and other metrics which are regularly provided to the CODM and used by the CODM to make decisions regarding the Company’s business, including resource allocation and performance assessment in our condensed consolidated statements of operations. The CODM does not receive additional expenses other than those presented within our condensed consolidated statements of operations.
Recent Accounting Pronouncements Not Yet Adopted	Recent Accounting Pronouncements Not Yet Adopted In January 2025, the Financial Accounting Standards Board (“FASB”) issued ASU 2025-01, Income Statement — Reporting Comprehensive Income — Expense Disaggregation Disclosures (Subtopic 220-40): Clarifying the Effective Date, which clarifies the effective date of ASU 2024-03 and does not change its underlying disclosure requirements. ASU 2024-03 requires tabular disclosure of specified natural expenses within certain income statement expense captions, a qualitative description of amounts not separately disaggregated and disclosure of our definition and total amount of selling expenses. We plan to adopt this guidance and comply with the disclosure requirements when it becomes mandatorily effective for annual periods beginning after December 15, 2026. The adoption of ASU 2024-03 is not expected to have any effect on the Company’s financial position, results of operations or cash flows as it modifies disclosure requirements only. In December 2025, FASB issued ASU 2025-12, Codification Improvements, which includes updates for a broad range of Accounting Topics arising from technical corrections, unintended application of the Codification, clarifications and other minor improvements. We plan to adopt this guidance and comply with the disclosure requirements when it becomes mandatorily effective for annual periods beginning after December 15, 2026. We are currently assessing the impact of this standard on our Financial Statements and related disclosures.

Disclosure of accounting policy for segment reporting.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-41

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 29
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-29

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 29
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-29

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 29
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-29

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 47
-Subparagraph (bb)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-47

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 29
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-29

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 54
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-54

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 36
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-36

Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 47
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-47

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 29
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-29

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 29
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-29

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 29
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-29

+ Details

Basis of Presentation

Consolidation

Segment Information

Recent Accounting Pronouncements Not Yet Adopted

LandBridge Co LLC 10-Q