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Senior Living Community Management Agreements - Narrative (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($) community	Mar. 31, 2023 USD ($) community
Property operating expenses		$ 307,604	$ 286,080
Affiliated Entity | Five Star
Property management agreement expense		10,407	10,014
Related party transaction capitalized amount		409	877
Affiliated Entity | Five Star | Rehabilitation Services
Property operating expenses		10	879
Affiliated Entity | Five Star | Operating Expense
Property management agreement expense		$ 9,998	$ 9,137
Senior Living Communities | Affiliated Entity | Five Star
Number of communities managed | community		119	119
Senior Living Communities | Affiliated Entity | Third Party Managers
Number of communities managed | community		111	111
Property management agreement expense		$ 5,725	$ 5,238
Senior Living Communities | Affiliated Entity | Third Party Managers | Forecast
Termination and other fees	$ 1,106

X

- Definition

Represents the number of communities managed by a related party.

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X

- Definition

Payments For Termination And Other Fees

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- Definition

Related Party Transaction Capitalized Amount

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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.

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- Definition

Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense.

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- Details

Name:	srt_CounterpartyNameAxis=dhc_FiveStarQualityCareIncMember
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Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=dhc_RehabilitationServicesMember
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- Details

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- Details

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