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Rental Property - Assets Held for Sale (Details) $ in Millions	Jun. 30, 2026 USD ($) building
Long Lived Assets Held-for-sale [Line Items]
Number of properties | building	1
Land
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	$ 2.4
Building and Building Improvements
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	$ 11.8

X

- Definition

Number Of Real Estate Properties, Held For Sale

+ References

No definition available.

+ Details

Name:	stag_NumberOfRealEstatePropertiesHeldForSale
Namespace Prefix:	stag_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of assets held-for-sale that are not part of a disposal group.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 15
-Paragraph 4
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482309/360-10-15-4

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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Namespace Prefix:
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X

- Details

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Namespace Prefix:
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