Represents the damage limitation of unsecured environmental indemnities.

No definition available.

Name:	sho_DamageLimitationOfUnsecuredEnvironmentalIndemnities
Namespace Prefix:	sho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number Of Real Estate Properties Held For Investment

+ References

No definition available.

+ Details

Name:	sho_NumberOfRealEstatePropertiesHeldForInvestment
Namespace Prefix:	sho_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the term of unsecured environmental indemnities.

+ References

No definition available.

+ Details

Name:	sho_TermOfUnsecuredEnvironmentalIndemnities
Namespace Prefix:	sho_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the expense incurred for wages, benefits and severance for furloughed or terminated employees.

+ References

No definition available.

+ Details

Name:	sho_WagesBenefitsAndSeveranceForFurloughedOrTerminatedEmployees
Namespace Prefix:	sho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13531-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13537-108611

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

Name:	us-gaap_RepaymentsOfLongTermLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.P.3)
-URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4(b))
-URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

+ Details

Name:	us-gaap_SeveranceCosts1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=sho_NumberOfRoomsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=stpr_CA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=stpr_FL
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=stpr_HI
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=stpr_IL
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=stpr_MA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_RevenueFromContractWithCustomerProductAndServiceBenchmarkMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_FinancialStandbyLetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=us-gaap_HotelOwnedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments and Contingencies - Other Commitments and Concentration of Risk (Details) $ in Thousands		3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2020 USD ($) property	Sep. 30, 2020 USD ($) property	Sep. 30, 2020 USD ($) property	Sep. 30, 2020 USD ($) property	Nov. 01, 2020 property
Concentration of Risk
Number of hotels held for investment	19	19	19	19
Number of hotels owned by the Company	19	19	19	19	19
Other
Wages, benefits and severance for furloughed or terminated employees \| $		$ 11,300	$ 28,900
Severance costs \| $		6,800	$ 8,000
Term of unsecured environmental indemnities			0 years
Damage limitation of unsecured environmental indemnities \| $			$ 0
Payments on credit facility \| $			300,000
Percentage of total rooms \| California
Concentration of Risk
Concentration risk (as a percent)	32.00%
Percentage of total rooms \| Florida
Concentration of Risk
Concentration risk (as a percent)	10.00%
Percentage of total rooms \| Hawaii
Concentration of Risk
Concentration risk (as a percent)	5.00%
Percentage of total rooms \| Illinois
Concentration of Risk
Concentration risk (as a percent)	11.00%
Percentage of total rooms \| Massachusetts
Concentration of Risk
Concentration risk (as a percent)	15.00%
Percentage of total revenue generated by hotels \| California
Concentration of Risk
Concentration risk (as a percent)				35.00%
Percentage of total revenue generated by hotels \| Florida
Concentration of Risk
Concentration risk (as a percent)				12.00%
Percentage of total revenue generated by hotels \| Hawaii
Concentration of Risk
Concentration risk (as a percent)				13.00%
Percentage of total revenue generated by hotels \| Illinois
Concentration of Risk
Concentration risk (as a percent)				6.00%
Percentage of total revenue generated by hotels \| Massachusetts
Concentration of Risk
Concentration risk (as a percent)				14.00%
Financial standby letter of credit
Other
Outstanding irrevocable letters of credit \| $	$ 400	$ 400	400	$ 400
Payments on credit facility \| $			$ 0
Hotel owned by the Company \| California
Concentration of Risk
Number of hotels owned by the Company	5	5	5	5
Hotel owned by the Company \| Florida
Concentration of Risk
Number of hotels owned by the Company	2	2	2	2
Hotel owned by the Company \| Hawaii
Concentration of Risk
Number of hotels owned by the Company	1	1	1	1
Hotel owned by the Company \| Illinois
Concentration of Risk
Number of hotels owned by the Company	3	3	3	3
Hotel owned by the Company \| Massachusetts
Concentration of Risk
Number of hotels owned by the Company	2	2	2	2