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Summary of Significant Accounting Policies - Government Grant Income (Details) - Government Assistance, CARES Act - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Unusual or Infrequent Item, or Both [Line Items] |  |
Government grant income | $ 4,968 | $ 0
Government grant income recorded in other income (expense), net |  |
Unusual or Infrequent Item, or Both [Line Items] |  |
Government grant income | 1,310 | 0
Government grant income recorded in equity income (loss) from unconsolidated joint ventures |  |
Unusual or Infrequent Item, or Both [Line Items] |  |
Government grant income | 426 | 0
Government grant income recorded in income (loss) from discontinued operations |  |
Unusual or Infrequent Item, or Both [Line Items] |  |
Government grant income | $ 3,232 | $ 0

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- Definition Government Grant Income + References No definition available. + Details
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Namespace Prefix: | peak_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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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
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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: |

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- Details
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Namespace Prefix: |
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Balance Type: |
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