Summary of Fair Value of Financial Instruments - Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Financial assets and liabilities measured at fair value:
Derivative assets, Carrying value	$ 128	$ 263
Financial assets not measured at fair value:
Cash and cash equivalents	520,387	92,905	$ 165,476	$ 262,636
Restricted cash, Carrying Value	70,090	74,408	95,318	$ 135,571
Accounts receivable, Carrying value	37,242	21,760
Notes receivable, net, Carrying value	8,555	8,263
Due from related parties, net	7,407	5,801
Due from third-party hotel managers, Carrying value	15,917	9,383
Financial liabilities not measured at fair value:
Accounts payable and accrued expenses	110,761	99,954
Accrued interest payable	19,328	98,685
Dividends payable, Carrying value	236	868	$ 868
Due to Ashford Inc., net, Carrying value	4,844	13,383
Due to related parties, net, Carrying value	800	0
Due to third-party hotel managers, Carrying value	889	184
Carrying Value
Financial assets and liabilities measured at fair value:
Derivative assets, Carrying value	128	263
Derivative liabilities, Carrying value	45,078	0
Financial assets not measured at fair value:
Cash and cash equivalents	520,387	92,905
Restricted cash, Carrying Value	70,090	74,408
Accounts receivable, Carrying value	37,242	21,760
Notes receivable, net, Carrying value	8,555	8,263
Due from related parties, net	7,407	5,801
Due from third-party hotel managers, Carrying value	15,917	9,383
Financial liabilities not measured at fair value:
Indebtedness, Carrying Value	3,860,066	3,711,297
Accounts payable and accrued expenses	110,761	99,954
Accrued interest payable	19,328	98,685
Dividends payable, Carrying value	236	868
Due to Ashford Inc., net, Carrying value	4,844	13,383
Due to related parties, net, Carrying value	800	0
Due to third-party hotel managers, Carrying value	889	184
Estimated Fair Value
Financial assets and liabilities measured at fair value:
Derivative assets, Estimated fair value	128	263
Derivative liabilities, Estimated fair value	45,078	0
Financial assets not measured at fair value:
Cash and cash equivalents, Estimated fair value	520,387	92,905
Restricted cash, Estimated fair value	70,090	74,408
Accounts receivable, Estimated fair value	37,242	21,760
Due from related parties, net, Estimated fair value	7,407	5,801
Due from third party hotel managers, Estimated fair value	15,917	9,383
Financial liabilities not measured at fair value:
Accounts payable and accrued expenses, Estimated fair value	110,761	99,954
Accrued interest payable, Estimated fair value	19,328	98,685
Dividends payable, Estimated fair value	236	868
Due to Ashford Inc., net, Estimated fair value	4,844	13,383
Due to related parties, net, Estimated fair value	800	0
Due to third-party hotel managers, Estimated fair value	889	184
Minimum | Estimated Fair Value
Financial assets not measured at fair value:
Notes receivable, net, Estimated fair value	8,127	7,850
Financial liabilities not measured at fair value:
Indebtedness, Estimated fair value	3,207,933	3,167,369
Maximum | Estimated Fair Value
Financial assets not measured at fair value:
Notes receivable, net, Estimated fair value	8,983	8,676
Financial liabilities not measured at fair value:
Indebtedness, Estimated fair value	$ 3,545,607	$ 3,500,777