Investment in Hotel Properties (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012 item	Mar. 31, 2013
Investment in Hotel Properties
Investment in hotel properties, gross	$ 3,348,849	$ 3,391,069
Accumulated depreciation and amortization	(666,972)	(701,786)
Investment in hotel properties, net	2,681,877	2,689,283
Number of hotels acquired	2
Land
Investment in Hotel Properties
Investment in hotel properties, gross	260,939	260,939
Buildings and improvements
Investment in Hotel Properties
Investment in hotel properties, gross	2,541,024	2,554,898
Furniture, fixtures and equipment
Investment in Hotel Properties
Investment in hotel properties, gross	329,770	341,252
Intangibles
Investment in Hotel Properties
Investment in hotel properties, gross	167,467	167,467
Franchise fees
Investment in Hotel Properties
Investment in hotel properties, gross	1,261	1,261
Construction in process
Investment in Hotel Properties
Investment in hotel properties, gross	$ 48,388	$ 65,252

Name:	sho_InvestmentInHotelPropertiesLineItems
Namespace Prefix:	sho_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Represents the number of hotels acquired during the period.

+ References

No definition available.

+ Details

Name:	sho_NumberOfLodgingPropertiesAcquired
Namespace Prefix:	sho_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The cumulative amount of depreciation for real estate property held for investment purposes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.1(3))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 7

+ Details

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

- Definition

Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

+ References

+ Details

Name:	us-gaap_RealEstateInvestmentPropertyAtCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

+ References

+ Details

Name:	us-gaap_RealEstateInvestmentPropertyNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant