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Related Party Transactions - Fees Related to Property and Project Management Agreements (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Ashford Inc. |  |
Related Party Transaction [Line Items] |  |
Corporate, general and administrative | $ 527 | $ 19

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- Definition Corporate general and administrative expense reimbursements incurred to related parties. + References No definition available. + Details
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Namespace Prefix: | aht_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_CounterpartyNameAxis=aht_AshfordInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |