Organization and Description of Business (Details)	6 Months Ended
	Jun. 30, 2021 property
Organization and Description of Business
Number of hotels owned by the Company	18
Number of hotels reopened after being temporarily suspended due to COVID-19	13
Sunstone Hotel Partnership, LLC
Organization and Description of Business
Controlling interest owned (as a percent)	100.00%
Marriott
Organization and Description of Business
Number of hotels owned by the Company	6
Crestline Hotels & Resorts
Organization and Description of Business
Number of hotels owned by the Company	2
Highgate Hotels L.P. and an affiliate
Organization and Description of Business
Number of hotels owned by the Company	2
Hilton Worldwide
Organization and Description of Business
Number of hotels owned by the Company	2
Interstate Hotels & Resorts, Inc
Organization and Description of Business
Number of hotels owned by the Company	2
Davidson Hotels & Resorts
Organization and Description of Business
Number of hotels owned by the Company	1
Hyatt Corporation
Organization and Description of Business
Number of hotels owned by the Company	1
Montage North America, LLC
Organization and Description of Business
Number of hotels owned by the Company	1
Singh Hospitality, LLC
Organization and Description of Business
Number of hotels owned by the Company	1
Oceans Edge Resort & Marina
Organization and Description of Business
Date operations temporarily suspended due to COVID-19	Mar. 22, 2020
Date operations reopened after being temporarily suspended due to COVID-19	Jun. 04, 2020
Embassy Suites Chicago
Organization and Description of Business
Date operations temporarily suspended due to COVID-19	Apr. 01, 2020
Date operations reopened after being temporarily suspended due to COVID-19	Jul. 01, 2020
Marriott Boston Long Wharf
Organization and Description of Business
Date operations temporarily suspended due to COVID-19	Mar. 12, 2020
Date operations reopened after being temporarily suspended due to COVID-19	Jul. 07, 2020
Hilton New Orleans St. Charles
Organization and Description of Business
Date operations temporarily suspended due to COVID-19	Mar. 28, 2020
Date operations reopened after being temporarily suspended due to COVID-19	Jul. 13, 2020
Hyatt Centric Chicago Magnificent Mile
Organization and Description of Business
Date operations temporarily suspended due to COVID-19	Apr. 06, 2020
Date operations reopened after being temporarily suspended due to COVID-19	Jul. 13, 2020
JW Marriott New Orleans
Organization and Description of Business
Date operations temporarily suspended due to COVID-19	Mar. 28, 2020
Date operations reopened after being temporarily suspended due to COVID-19	Jul. 14, 2020
Hilton San Diego Bayfront
Organization and Description of Business
Date operations temporarily suspended due to COVID-19	Mar. 23, 2020
Date operations reopened after being temporarily suspended due to COVID-19	Aug. 11, 2020
Renaissance Washington DC
Organization and Description of Business
Date operations temporarily suspended due to COVID-19	Mar. 26, 2020
Date operations reopened after being temporarily suspended due to COVID-19	Aug. 24, 2020
Hyatt Regency San Francisco
Organization and Description of Business
Date operations temporarily suspended due to COVID-19	Mar. 22, 2020
Date operations reopened after being temporarily suspended due to COVID-19	Oct. 01, 2020
Renaissance Orlando at SeaWorld
Organization and Description of Business
Date operations temporarily suspended due to COVID-19	Mar. 20, 2020
Date operations reopened after being temporarily suspended due to COVID-19	Oct. 01, 2020
The Bidwell Marriott Portland
Organization and Description of Business
Date operations temporarily suspended due to COVID-19	Mar. 27, 2020
Date operations reopened after being temporarily suspended due to COVID-19	Oct. 05, 2020
Wailea Beach Resort
Organization and Description of Business
Date operations temporarily suspended due to COVID-19	Mar. 25, 2020
Date operations reopened after being temporarily suspended due to COVID-19	Nov. 01, 2020
Hilton Garden Inn Chicago Downtown/Magnificent Mile
Organization and Description of Business
Date operations temporarily suspended due to COVID-19	Mar. 27, 2020
Date operations reopened after being temporarily suspended due to COVID-19	Apr. 01, 2021
Renaissance Westchester
Organization and Description of Business
Date operations temporarily suspended due to COVID-19	Apr. 04, 2020