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Real Property Acquisitions and Development - Construction Activity (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Segment Reporting Information [Line Items] |  |
Total construction in progress conversions | $ 73,458 | $ 22,990
Seniors Housing Operating |  |
Segment Reporting Information [Line Items] |  |
Total development projects | 73,458 | 0
Triple-net |  |
Segment Reporting Information [Line Items] |  |
Total development projects | $ 0 | $ 22,990

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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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- Definition Construction in progress conversions. + References No definition available. + Details
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Namespace Prefix: | well_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Development projects placed into service. + References No definition available. + Details
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Namespace Prefix: | well_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |