XML 28 R33.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Organization (Details) | Dec. 31, 2014 state building property
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Organization |
Number of properties owned | 370 us-gaap_NumberOfRealEstateProperties
Number of buildings owned | 397 snh_NumberOfBuildings
Number of states in which properties are located | 38 us-gaap_NumberOfStatesInWhichEntityOperates

X
- Definition Represents the number of buildings owned as of the balance sheet date. + References No definition available. + Details
Name: | snh_NumberOfBuildings
Namespace Prefix: | snh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- 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

X
- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration