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Property Rental Revenue (Tables) | 3 Months Ended
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Mar. 31, 2021
Property Rental Revenue |
Property Rental Revenue | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31,
​ |  | 2021 |  | 2020 | ​
​ | ​ | (In thousands) | ​
Fixed | ​ | $ | 112,249 | ​ | $ | 110,933 | ​
Variable | ​ | ​ | 9,992 | ​ | ​ | 9,447 | ​
Property rental revenue | ​ | $ | 122,241 | ​ | $ | 120,380 | ​

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- Definition Property rentals revenue + References No definition available. + Details
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Namespace Prefix: | jbgs_
Data Type: | xbrli:stringItemType
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Period Type: | duration

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- Definition Tabular disclosure of real estate properties and units in those properties that are included in the discussion of the nature of an entity's operations. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration