Organization and Description of Business (Details)	9 Months Ended
	Sep. 30, 2019 property
Organization and Description of Business
Number of hotels owned by the Company	21
Number of hotels held for investment	20
Sunstone Hotel Partnership, LLC
Organization and Description of Business
Controlling interest owned (as a percent)	100.00%
Hotel owned by the Company
Organization and Description of Business
Number of hotels owned by the Company	21
Hotel owned by the Company | Marriott
Organization and Description of Business
Number of hotels owned by the Company	8
Hotel owned by the Company | Interstate Hotels & Resorts, Inc
Organization and Description of Business
Number of hotels owned by the Company	3
Hotel owned by the Company | Highgate Hotels L.P. and an affiliate
Organization and Description of Business
Number of hotels owned by the Company	3
Hotel owned by the Company | Crestline Hotels & Resorts
Organization and Description of Business
Number of hotels owned by the Company	2
Hotel owned by the Company | Hilton Worldwide
Organization and Description of Business
Number of hotels owned by the Company	2
Hotel owned by the Company | Davidson Hotels & Resorts
Organization and Description of Business
Number of hotels owned by the Company	1
Hotel owned by the Company | Hyatt Corporation
Organization and Description of Business
Number of hotels owned by the Company	1
Hotel owned by the Company | Singh Hospitality, LLC
Organization and Description of Business
Number of hotels owned by the Company	1