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Organization and Description of Business (Details) ft² in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2026 ft² building state | Dec. 31, 2025
Real Estate Properties [Line Items] |  |
Number of properties | building | 601 |
Number of states in which the entity owned buildings | state | 41 |
Area (in square feet) | ft² | 120.3 |
STAG Industrial, Inc. [Member] |  |
Real Estate Properties [Line Items] |  |
Ownership interest in Operating Partnership (as a percent) | 98.00% | 98.10%

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- Definition Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482987/272-10-50-3 + Details
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