XML 52 R42.htm IDEA: XBRL DOCUMENT
v3.21.2

Leases and Management Agreements with Five Star - Narrative (Details) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 09, 2021 USD ($) unit community | Jan. 31, 2021 USD ($) | Jun. 30, 2021 USD ($) property trustee community shares | Jun. 30, 2020 USD ($) community | Jun. 30, 2021 USD ($) property trustee community shares | Jun. 30, 2020 USD ($) community | Aug. 03, 2021 community | Dec. 31, 2020 shares | Dec. 31, 2019 shares
Common shares of beneficial interest, shares issued (in shares) | shares |  |  | 238,374,572 |  | 238,374,572 |  |  | 238,268,478 |
Gain on lease termination |  |  | $ 0 | $ 0 | $ 0 | $ 22,896 |  |  |
Number of properties (property) | property |  |  | 392 |  | 392 |  |  |  |
Rental income |  |  | $ 398 | $ 488 | $ 795 | 782 |  |  |
Five Star |  |  |  |  |  |  |  |  |
Total rental income recognized |  |  |  |  |  | 75,000 |  |  |
Gain on lease termination |  |  |  |  |  | $ 22,896 |  |  |
Five Star |  |  |  |  |  |  |  |  |
Payments made in exchange for customary release |  | $ 5,763 |  |  |  |  |  |  |
Five Star | Senior Living Communities |  |  |  |  |  |  |  |  |
Number of properties (property) | community |  |  | 235 | 241 | 235 | 241 |  |  |
Number of real estate properties inadequate documentation | trustee |  |  | 1 |  | 1 |  |  |  |
Revenue reserve, management fees payable reduction |  |  |  |  | $ 115 |  |  |  |
Five Star | Senior Living Communities | Closed |  |  |  |  |  |  |  |  |
Number of properties (property) | community |  |  | 7 |  | 7 |  |  |  |
Five Star |  |  |  |  |  |  |  |  |
Common shares of beneficial interest, shares issued (in shares) | shares |  |  |  |  |  |  |  |  | 10,268,158
Aggregate Shares Issued | shares |  |  |  |  |  |  |  |  | 16,118,849
Five Star |  |  |  |  |  |  |  |  |
Investment owned, percentage of total shares outstanding |  |  | 33.70% |  | 33.70% |  |  |  |
Property management agreement expense |  |  | $ 12,927 | $ 15,706 | $ 26,777 | $ 32,756 |  |  |
Related party transaction capitalized amount |  |  | 715 | 444 | 1,549 | 906 |  |  |
Five Star | Operating Expense |  |  |  |  |  |  |  |  |
Property management agreement expense |  |  | 12,212 | 15,262 | 25,228 | 31,850 |  |  |
Five Star | Senior Living Communities |  |  |  |  |  |  |  |  |
Number of properties (property) | community | 120 |  |  |  |  |  |  |  |
Number of property units (units) | unit | 18,000 |  |  |  |  |  |  |  |
Related party transactions, termination percentage | 10.00% |  |  |  |  |  |  |  |
Percentage target EBITDA of new management agreement not earned | 80.00% |  |  |  |  |  |  |  |
Five Star | Senior Living Communities | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |
Total rental income recognized | $ 682,000 |  | 11,914 |  | 11,914 |  |  |  |
Number of property units (units) | unit | 7,500 |  |  |  |  |  |  |  |
Five Star | Senior Living Communities | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations | Scenario, Plan |  |  |  |  |  |  |  |  |
Number of properties (property) | community | 108 |  |  |  |  |  |  |  |
Five Star | Senior Living Communities | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations | Subsequent Event |  |  |  |  |  |  |  |  |
Number of properties (property) | community |  |  |  |  |  |  | 76 |  |
Number of managers | community |  |  |  |  |  |  | 4 |  |
Five Star | Senior Living Communities | Closed |  |  |  |  |  |  |  |  |
Number of property units (units) | unit | 1,500 |  |  |  |  |  |  |  |
Five Star | Rehabilitation Services |  |  |  |  |  |  |  |  |
Expenses from transactions with related party |  |  | $ 2,630 | $ 5,814 | $ 8,071 | $ 13,871 |  |  |
Five Star | Third Party Investor | Senior Living Communities | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations | Subsequent Event |  |  |  |  |  |  |  |  |
Number of properties (property) | community |  |  |  |  |  |  | 41 |  |

X
- Definition Aggregate Shares Issued + References No definition available. + Details
Name: | dhc_AggregateSharesIssued
Namespace Prefix: | dhc_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of shares held as a percentage of the total shares outstanding at the end of the period. + References No definition available. + Details
Name: | dhc_InvestmentOwnedPercentageOfTotalSharesOutstanding
Namespace Prefix: | dhc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number Of Managers + References No definition available. + Details
Name: | dhc_NumberOfManagers
Namespace Prefix: | dhc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Real Estate Properties Inadequate Documentation + References No definition available. + Details
Name: | dhc_NumberOfRealEstatePropertiesInadequateDocumentation
Namespace Prefix: | dhc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Payments Made In Exchange For Customary Release + References No definition available. + Details
Name: | dhc_PaymentsMadeInExchangeForCustomaryRelease
Namespace Prefix: | dhc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Related Party Transaction Capitalized Amount + References No definition available. + Details
Name: | dhc_RelatedPartyTransactionCapitalizedAmount
Namespace Prefix: | dhc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Expenses recognized during the period resulting from property management transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period. + References No definition available. + Details
Name: | dhc_RelatedPartyTransactionExpensesFromPropertyManagementAgreementTransactionsWithRelatedParty
Namespace Prefix: | dhc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Related Party Transaction, Percentage Target EBITDA Of New Management Agreement Not Earned + References No definition available. + Details
Name: | dhc_RelatedPartyTransactionPercentageTargetEBITDAOfNewManagementAgreementNotEarned
Namespace Prefix: | dhc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Related Party Transactions, Termination Percentage + References No definition available. + Details
Name: | dhc_RelatedPartyTransactionsTerminationPercentage
Namespace Prefix: | dhc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Revenue Reserve, Management Fees Payable Reduction + References No definition available. + Details
Name: | dhc_RevenueReserveManagementFeesPayableReduction
Namespace Prefix: | dhc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of gain (loss) on termination of lease before expiration of lease term. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 40 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123386189&loc=SL77918607-209975 + Details
Name: | us-gaap_GainLossOnTerminationOfLease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of lease income from operating, direct financing, and sales-type leases. Includes, but is not limited to, variable lease payments, interest income, profit (loss) recognized at commencement, and lease payments paid and payable to lessor. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=124258985&loc=SL77919372-209981 + Details
Name: | us-gaap_LeaseIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstateProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of units in a real estate property owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfUnitsInRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of transactions with related party during the financial reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864 + Details
Name: | us-gaap_RelatedPartyTransactionAmountsOfTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
Name: | us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=dhc_FiveStarQualityCareIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=dhc_FiveStarQualityCareIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=dhc_SeniorLivingCommunityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupHeldforsaleNotDiscontinuedOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=dhc_FiveStarQualityCareIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=dhc_FiveStarQualityCareIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_OperatingExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupDisposedOfByMeansOtherThanSaleNotDiscontinuedOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=us-gaap_ScenarioPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=dhc_RehabilitationServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=dhc_ThirdPartyInvestorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |