XML 37 R25.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Basis of Presentation (Details) $ in Thousands | 1 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2017 building property | Sep. 30, 2018 USD ($) | Dec. 31, 2017 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |
Number of properties included in joint venture agreement | property | 1 |  |
Number of buildings included in joint venture agreement | building | 2 |  |
Variable interest entity, consolidated, carrying amount, assets |  | $ 1,070,402 | $ 1,102,986
Variable interest entity, consolidated, carrying amount, liabilities |  | $ 714,635 | $ 720,678

X
- Definition Number of Buildings Included in Joint Venture Agreement + References No definition available. + Details
Name: | snh_NumberofBuildingsIncludedinJointVentureAgreement
Namespace Prefix: | snh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Properties Included in Joint Venture Agreement + References No definition available. + Details
Name: | snh_NumberofPropertiesIncludedinJointVentureAgreement
Namespace Prefix: | snh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The carrying amount of the consolidated Variable Interest Entity's assets included in the reporting entity's statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=108788376&loc=d3e5710-111685 + Details
Name: | us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The carrying amount of the consolidated Variable Interest Entity's liabilities included in the reporting entity's statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=108788376&loc=d3e5710-111685 + Details
Name: | us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant