Organization and Description of Business (Details) ft² in Millions |
9 Months Ended | 12 Months Ended |
|---|---|---|
|
Sep. 30, 2026
ft²
state
building
|
Dec. 31, 2025 |
|
| Real Estate Properties [Line Items] | ||
| Number of properties | building | 606 | |
| Number of states in which the entity owned buildings | state | 41 | |
| Area (in square feet) | ft² | 123.0 | |
| STAG Industrial, Inc. | ||
| Real Estate Properties [Line Items] | ||
| Ownership interest in Operating Partnership (as a percent) | 98.00% | 98.10% |