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Indebtedness, net - Schedule of Net Premium (Discount) Amortization Recognized (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Debt Disclosure [Abstract]
Interest expense and amortization of discount and loan costs	$ (1,913)	$ 57	$ (4,606)	$ 170

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- Definition

Interest Expense And Amortization Of Discount (Premium) And Loan Costs

+ References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

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