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Rental Property - Assets Held for Sale (Details) $ in Millions | Mar. 31, 2026 USD ($) building
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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 | $ 0.9
Building and Building Improvements |
Long Lived Assets Held-for-sale [Line Items] |
Assets held for sale | $ 6.6

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- Definition Number Of Real Estate Properties, Held For Sale + References No definition available. + Details
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Namespace Prefix: | stag_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- 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_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- 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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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis=us-gaap_BuildingAndBuildingImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |