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Commitments and Contingencies (Details 3) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
401(k) Savings and Retirement Plan      
Age required for participating in 401(k) plan 21 years    
Service period required for participating in 401(k) plan 6 months    
Concentration of Risk      
Number of hotels which are held for investment 30us-gaap_NumberOfRealEstateProperties    
Other      
Term of unsecured environmental indemnities 0 years    
Damage limitation of unsecured environmental indemnities $ 0sho_DamageLimitationOfUnsecuredEnvironmentalIndemnities    
Property general and administrative      
401(k) Savings and Retirement Plan      
Contributions to retirement plans 1,500,000us-gaap_DefinedContributionPlanCostRecognized
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_GeneralAndAdministrativeExpenseMember		 1,100,000us-gaap_DefinedContributionPlanCostRecognized
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_GeneralAndAdministrativeExpenseMember		 900,000us-gaap_DefinedContributionPlanCostRecognized
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_GeneralAndAdministrativeExpenseMember
Discontinued Operations [Member]      
401(k) Savings and Retirement Plan      
Contributions to retirement plans 0us-gaap_DefinedContributionPlanCostRecognized
/ us-gaap_IncomeStatementLocationAxis
= sho_DiscontinuedOperationsMember		 3,000us-gaap_DefinedContributionPlanCostRecognized
/ us-gaap_IncomeStatementLocationAxis
= sho_DiscontinuedOperationsMember		 100,000us-gaap_DefinedContributionPlanCostRecognized
/ us-gaap_IncomeStatementLocationAxis
= sho_DiscontinuedOperationsMember
Safe harbor elective contribution      
401(k) Savings and Retirement Plan      
Percentage of eligible employee annual base earnings contributed by the company (as a percent) 3.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
/ us-gaap_DefinedContributionPlanTypeAxis
= sho_DefinedContributionPlanSafeHarborPlanMember		 3.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
/ us-gaap_DefinedContributionPlanTypeAxis
= sho_DefinedContributionPlanSafeHarborPlanMember		 3.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
/ us-gaap_DefinedContributionPlanTypeAxis
= sho_DefinedContributionPlanSafeHarborPlanMember
Contributions to retirement plans 300,000us-gaap_DefinedContributionPlanCostRecognized
/ us-gaap_DefinedContributionPlanTypeAxis
= sho_DefinedContributionPlanSafeHarborPlanMember		 200,000us-gaap_DefinedContributionPlanCostRecognized
/ us-gaap_DefinedContributionPlanTypeAxis
= sho_DefinedContributionPlanSafeHarborPlanMember		 200,000us-gaap_DefinedContributionPlanCostRecognized
/ us-gaap_DefinedContributionPlanTypeAxis
= sho_DefinedContributionPlanSafeHarborPlanMember
California      
Concentration of Risk      
Number of hotels which are held for investment 9us-gaap_NumberOfRealEstateProperties
/ us-gaap_ConcentrationRiskByTypeAxis
= stpr_CA		    
New York      
Concentration of Risk      
Number of hotels which are held for investment 3us-gaap_NumberOfRealEstateProperties
/ us-gaap_ConcentrationRiskByTypeAxis
= stpr_NY		    
Illinois      
Concentration of Risk      
Number of hotels which are held for investment 3us-gaap_NumberOfRealEstateProperties
/ us-gaap_ConcentrationRiskByTypeAxis
= stpr_IL		    
Massachusetts      
Concentration of Risk      
Number of hotels which are held for investment 3us-gaap_NumberOfRealEstateProperties
/ us-gaap_ConcentrationRiskByTypeAxis
= stpr_MA		    
Greater Washington DC Area      
Concentration of Risk      
Number of hotels which are held for investment 3us-gaap_NumberOfRealEstateProperties
/ us-gaap_ConcentrationRiskByTypeAxis
= sho_GreaterWashingtonDCAreaMember		    
Number of rooms | California      
Concentration of Risk      
Concentration risk (as a percent) 31.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= sho_NumberOfRoomsMember
/ us-gaap_ConcentrationRiskByTypeAxis
= stpr_CA		    
Number of rooms | New York      
Concentration of Risk      
Concentration risk (as a percent) 9.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= sho_NumberOfRoomsMember
/ us-gaap_ConcentrationRiskByTypeAxis
= stpr_NY		    
Number of rooms | Illinois      
Concentration of Risk      
Concentration risk (as a percent) 8.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= sho_NumberOfRoomsMember
/ us-gaap_ConcentrationRiskByTypeAxis
= stpr_IL		    
Number of rooms | Massachusetts      
Concentration of Risk      
Concentration risk (as a percent) 14.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= sho_NumberOfRoomsMember
/ us-gaap_ConcentrationRiskByTypeAxis
= stpr_MA		    
Number of rooms | Greater Washington DC Area      
Concentration of Risk      
Concentration risk (as a percent) 13.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= sho_NumberOfRoomsMember
/ us-gaap_ConcentrationRiskByTypeAxis
= sho_GreaterWashingtonDCAreaMember		    
Revenue generated by hotels | California      
Concentration of Risk      
Concentration risk (as a percent) 33.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= stpr_CA		    
Revenue generated by hotels | New York      
Concentration of Risk      
Concentration risk (as a percent) 13.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= stpr_NY		    
Revenue generated by hotels | Illinois      
Concentration of Risk      
Concentration risk (as a percent) 7.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= stpr_IL		    
Revenue generated by hotels | Massachusetts      
Concentration of Risk      
Concentration risk (as a percent) 14.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= stpr_MA		    
Revenue generated by hotels | Greater Washington DC Area      
Concentration of Risk      
Concentration risk (as a percent) 12.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= sho_GreaterWashingtonDCAreaMember		    
Collective Bargaining Agreements      
Concentration of Risk      
Concentration risk (as a percent) 29.20%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_UnionizedEmployeesConcentrationRiskMember		    
Workers' compensation insurance programs      
Other      
Outstanding irrevocable letters of credit 700,000us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sho_WorkersCompensationInsuranceProgramsMember		    
Draws on letters of credit 0us-gaap_ProceedsFromLinesOfCredit
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sho_WorkersCompensationInsuranceProgramsMember		    
Employment Agreements      
Employment Agreements      
2015 6,319,000us-gaap_ContractualObligationDueInNextTwelveMonths
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sho_ContractualObligationsMember		    
2016 706,000us-gaap_ContractualObligationDueInSecondYear
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sho_ContractualObligationsMember		    
Total $ 7,025,000us-gaap_ContractualObligation
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sho_ContractualObligationsMember