Indebtedness, net - Schedule of Net Premium (Discount) Amortization Recognized (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Debt Disclosure [Abstract]
Interest expense and amortization of discount and loan costs	$ (228)	$ 57	$ (2,693)	$ 113

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

No definition available.

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