Debt Instrument, Debt Yield Extension, Percent

No definition available.

Name:	aht_DebtInstrumentDebtYieldExtensionPercent
Namespace Prefix:	aht_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Interest Rate Term

+ References

No definition available.

+ Details

Name:	aht_DebtInstrumentInterestRateTerm
Namespace Prefix:	aht_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Number Of Extension Options

+ References

No definition available.

+ Details

Name:	aht_DebtInstrumentNumberOfExtensionOptions
Namespace Prefix:	aht_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Term After Closing Of Debt, Option To Pay Accrued Interest In Kind

+ References

No definition available.

+ Details

Name:	aht_DebtInstrumentTermAfterClosingOfDebtOptionToPayAccruedInterestInKind
Namespace Prefix:	aht_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Term Of Extension Options

+ References

No definition available.

+ Details

Name:	aht_DebtInstrumentTermOfExtensionOptions
Namespace Prefix:	aht_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Derivative Instrument, Agreement, Cash Payment, Percent Of Loans Advanced

+ References

No definition available.

+ Details

Name:	aht_DerivativeInstrumentAgreementCashPaymentPercentOfLoansAdvanced
Namespace Prefix:	aht_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Derivative Instrument, Agreement, Future Issuance Of Warrants, Percent Of Common Stock

+ References

No definition available.

+ Details

Name:	aht_DerivativeInstrumentAgreementFutureIssuanceOfWarrantsPercentOfCommonStock
Namespace Prefix:	aht_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Derivative Instrument, Agreement, Future Issuance Of Warrants, Percentage Of Outstanding Common Stock, Decrease, Dependent On Borrower Delivering Equity Pledges From Certain Subsidiaries

+ References

No definition available.

+ Details

Name:	aht_DerivativeInstrumentAgreementFutureIssuanceOfWarrantsPercentageOfOutstandingCommonStockDecreaseDependentOnBorrowerDeliveringEquityPledgesFromCertainSubsidiaries
Namespace Prefix:	aht_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Derivative Instrument, Agreement, Future Issuance Of Warrants, Percentage Of Outstanding Common Stock, Increase, Dependent On Delayed Draw Term Loans Drawn

+ References

No definition available.

+ Details

Name:	aht_DerivativeInstrumentAgreementFutureIssuanceOfWarrantsPercentageOfOutstandingCommonStockIncreaseDependentOnDelayedDrawTermLoansDrawn
Namespace Prefix:	aht_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Non-Cash Loan Principal Amount Amortized

+ References

No definition available.

+ Details

Name:	aht_NonCashLoanPrincipalAmountAmortized
Namespace Prefix:	aht_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Noncash Loan Principal Associated With Default Interest And Late Fees

+ References

No definition available.

+ Details

Name:	aht_NoncashLoanPrincipalAssociatedWithDefaultInterestAndLateFees
Namespace Prefix:	aht_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 3: 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(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69C
-URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69B
-URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- 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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959

+ Details

Name:	us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Reflects the difference between the fair value of payments made to legally extinguish a debt and its carrying value at that time. This item excludes the write-off of amounts previously capitalized as debt issuance costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123467658&loc=d3e12317-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123467658&loc=d3e12355-112629

+ Details

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebtBeforeWriteOffOfDeferredDebtIssuanceCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_FairValueByLiabilityClassAxis=us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_EmbeddedDerivativeFinancialInstrumentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=aht_CreditAgreementInitialTermLoanAndInitialDelayedDrawTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=aht_OaktreeCapitalManagementLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=aht_CreditAgreementInitialTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=aht_CreditAgreementAdditionalDelayedDrawTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=aht_CreditAgreementInitialDelayedDrawTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_MortgagesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=aht_MortgageLoanTwentyFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Indebtedness, net - Narrative (Details)		3 Months Ended		6 Months Ended
Indebtedness, net - Narrative (Details)	Jan. 15, 2021 USD ($) extension	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jan. 16, 2023	Feb. 09, 2021	Feb. 08, 2021	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Fair value of derivative liability	$ 43,700,000
Debt yield extension (as a percent)							8.00%	10.38%
Gain (loss) on extinguishment of debt		$ 10,604,000	$ 0	$ 10,604,000	$ 0
Non-cash loan principal associated with default interest and late charges				32,627,000	$ 0
Amount of capitalized principal that was amortized		10,800,000		27,600,000
Derivative liability \| Embedded debt derivative
Debt Instrument [Line Items]
Cash payment, percentage of loans advanced	15.00%
Future issuance of warrants, percentage of outstanding common stock	19.90%
Maximum \| Derivative liability \| Embedded debt derivative
Debt Instrument [Line Items]
Future issuance of warrants, percentage of outstanding common stock, increase, dependent on delayed draw term loans drawn	15.00%
Future issuance of warrants, percentage of outstanding common stock, decrease, dependent on borrower delivering equity pledges from certain subsidiaries	4.00%
Credit Agreement, Initial Term Loan and Initial Delayed Draw Term Loan \| Oaktree Capital Management, L.P.
Debt Instrument [Line Items]
Interest rate	16.00%
Interest rate term (in years)	2 years
Term to have the option to pay accrued interest in kind (in years)	2 years
Credit Agreement, Initial Term Loan and Initial Delayed Draw Term Loan \| Oaktree Capital Management, L.P. \| Subsequent Event
Debt Instrument [Line Items]
Interest rate						14.00%
Credit Agreement, Initial Term Loan
Debt Instrument [Line Items]
Initial term of loan (in years)	3 years
Number of extension options \| extension	2
Term of extension option (in years)	1 year
Credit Agreement, Additional Delayed Draw Term Loan \| Oaktree Capital Management, L.P.
Debt Instrument [Line Items]
Interest rate	18.50%
Interest rate term (in years)	2 years
Credit Agreement, Additional Delayed Draw Term Loan \| Oaktree Capital Management, L.P. \| Subsequent Event
Debt Instrument [Line Items]
Interest rate						16.50%
Line of Credit \| Credit Agreement, Initial Term Loan \| Oaktree Capital Management, L.P.
Debt Instrument [Line Items]
Principal amount	$ 200,000,000
Line of Credit \| Credit Agreement, Initial Term Loan \| Oaktree Capital Management, L.P. \| Minimum
Debt Instrument [Line Items]
Principal amount	400,000,000
Line of Credit \| Credit Agreement, Initial Delayed Draw Term Loan \| Oaktree Capital Management, L.P.
Debt Instrument [Line Items]
Principal amount	150,000,000
Line of Credit \| Credit Agreement, Additional Delayed Draw Term Loan \| Oaktree Capital Management, L.P.
Debt Instrument [Line Items]
Principal amount	$ 100,000,000
Mortgages
Debt Instrument [Line Items]
Debt balance		$ 3,700,000,000		$ 3,700,000,000
Mortgages \| Mortgage loan 24
Debt Instrument [Line Items]
Interest rate		4.45%		4.45%
Debt balance		$ 0		$ 0					$ 19,369,000
Gain (loss) on extinguishment of debt		$ 10,600,000		$ 10,600,000