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v3.21.2

Subsequent Events (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2021 USD ($) apartmentCommunity apartmentUnit | Sep. 30, 2021 USD ($)
Subsequent Event [Line Items] |  |
Contract purchase price |  | $ 48,000
Subsequent event | Forecast |  |
Subsequent Event [Line Items] |  |
Number of apartment communities | apartmentCommunity | 2 |
Contract purchase price | $ 106,000 |
Number of apartment units acquired | apartmentUnit | 490 |

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Asset Acquisition, Contract Purchase Price + References No definition available. + Details
Name: | wre_AssetAcquisitionContractPurchasePrice
Namespace Prefix: | wre_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Number Of Apartment Communities Acquired + References No definition available. + Details
Name: | wre_NumberOfApartmentCommunitiesAcquired
Namespace Prefix: | wre_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Number Of Apartment Units Acquired + References No definition available. + Details
Name: | wre_NumberOfApartmentUnitsAcquired
Namespace Prefix: | wre_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |