XML 49 R36.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Fair Value of Assets and Liabilities - Narrative (Details) - security | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value, Inputs, Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Fair value measurement, number of debt securities | 2 | 2
Fair Value, Inputs, Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Fair value measurement, number of debt securities | 4 | 4

X
- Definition Fair Value Measurement, Number Of Debt Securities + References No definition available. + Details
Name: | dhc_FairValueMeasurementNumberOfDebtSecurities
Namespace Prefix: | dhc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- 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
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |