XML 69 R52.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Indebtedness - Schedule of Secured and Other Debt (Details) $ in Thousands | Dec. 31, 2018 USD ($) property | Dec. 31, 2017 USD ($) | Mar. 31, 2017 | Jul. 31, 2016 USD ($) building property
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Principal Balance | $ 744,186 | $ 805,404 |  |
Net Book Value of Collateral | 6,341,908 | 6,370,286 |  |
Unamortized net premiums | 394 |  |  |
Deb issuance costs |  | 1,906 |  |
MOBs | Secured debt financing due 2026 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Number of Properties as Collateral | property |  |  |  | 1
Aggregate principal amount of mortgage debt |  |  |  | $ 620,000
Number of buildings mortgaged | building |  |  |  | 2
Secured Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal Balance | $ 744,580 | 807,310 |  |
Number of Properties as Collateral | property | 15 |  |  |
Net Book Value of Collateral | $ 942,614 | 1,135,031 |  |
Secured Debt | Mortgage notes 6.31% maturing in October 2018 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal Balance | $ 0 | 12,552 |  |
Interest rate (as a percent) | 6.31% |  |  |
Number of Properties as Collateral | property | 0 |  |  |
Net Book Value of Collateral | $ 0 | 16,470 |  |
Secured Debt | Mortgage notes 6.24% maturing in October 2018 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal Balance | $ 0 | 11,858 |  |
Interest rate (as a percent) | 6.24% |  |  |
Number of Properties as Collateral | property | 0 |  |  |
Net Book Value of Collateral | $ 0 | 15,025 |  |
Secured Debt | Mortgage notes 4.47% maturing in October 2018 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal Balance | $ 0 | 67,749 |  |
Interest rate (as a percent) | 4.47% |  |  |
Number of Properties as Collateral | property | 0 |  |  |
Net Book Value of Collateral | $ 0 | 175,975 |  |
Secured Debt | Mortgage notes 4.69% maturing in January 2019 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal Balance | $ 0 | 6,430 |  |
Interest rate (as a percent) | 4.69% |  |  |
Number of Properties as Collateral | property | 0 |  |  |
Net Book Value of Collateral | $ 0 | 9,477 |  |
Secured Debt | Mortgage notes 3.79% maturing in July 2019 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal Balance | $ 42,618 | 43,558 |  |
Interest rate (as a percent) | 3.79% |  |  |
Number of Properties as Collateral | property | 4 |  |  |
Net Book Value of Collateral | $ 61,199 | 62,596 |  |
Secured Debt | Mortgage notes 7.49% maturing in January 2022 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal Balance | $ 2,037 | 2,603 |  |
Interest rate (as a percent) | 7.49% |  |  |
Number of Properties as Collateral | property | 1 |  |  |
Net Book Value of Collateral | $ 14,602 | 15,099 |  |
Secured Debt | Mortgage notes 6.28% maturing July 2022 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal Balance | $ 13,146 | 13,741 |  |
Interest rate (as a percent) | 6.28% |  |  |
Number of Properties as Collateral | property | 1 |  |  |
Net Book Value of Collateral | $ 24,064 | 24,414 |  |
Secured Debt | Mortgage notes 4.85% maturing October 2022 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal Balance | $ 11,180 | 11,392 |  |
Interest rate (as a percent) | 4.85% |  |  |
Number of Properties as Collateral | property | 1 |  |  |
Net Book Value of Collateral | $ 20,602 | 21,065 |  |
Secured Debt | Mortgage notes 5.75% maturing October 2022 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal Balance | $ 16,441 | 0 |  |
Interest rate (as a percent) | 5.75% |  |  |
Number of Properties as Collateral | property | 2 |  |  |
Net Book Value of Collateral | $ 20,342 | 0 |  |
Secured Debt | Mortgage notes 6.64% maturing June 2023 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal Balance | $ 16,442 | 0 |  |
Interest rate (as a percent) | 6.64% |  |  |
Number of Properties as Collateral | property | 1 |  |  |
Net Book Value of Collateral | $ 20,538 | 0 |  |
Secured Debt | Mortgage notes 3.53% maturing in August 2026 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal Balance | $ 620,000 | 620,000 |  |
Interest rate (as a percent) | 3.53% |  |  |
Number of Properties as Collateral | property | 1 |  |  |
Net Book Value of Collateral | $ 745,079 | 764,622 |  |
Secured Debt | Mortgage notes 6.25% maturing in February 2033 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal Balance | $ 1,983 | 2,395 |  |
Interest rate (as a percent) | 6.25% |  |  |
Number of Properties as Collateral | property | 1 |  |  |
Net Book Value of Collateral | $ 4,402 | 4,473 |  |
Secured Debt | Mortgage notes 4.44% maturing July 2043 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal Balance | $ 10,901 | 0 |  |
Interest rate (as a percent) | 4.444% |  |  |
Number of Properties as Collateral | property | 1 |  |  |
Net Book Value of Collateral | $ 13,816 | 0 |  |
Secured Debt | Mortgage notes 4.38% maturing in September 2043 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal Balance | $ 0 | 4,338 |  |
Interest rate (as a percent) | 4.38% |  |  |
Number of Properties as Collateral | property | 0 |  |  |
Net Book Value of Collateral | $ 0 | 7,290 |  |
Secured Debt | Capital leases 7.70% maturing in April 2026 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal Balance | $ 9,832 | 10,694 |  |
Interest rate (as a percent) | 7.70% |  |  |
Number of Properties as Collateral | property | 2 |  |  |
Net Book Value of Collateral | $ 17,970 | $ 18,525 |  |
Joint Venture |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Ownership interest by parent |  |  | 55.00% |
Joint Venture | MOBs | Secured debt financing due 2026 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Ownership interest by parent |  |  |  | 55.00%

X
- Definition The number of buildings serving as collateral for debt as of the balance sheet date. + References No definition available. + Details
Name: | snh_NumberOfBuildingsCollateralized
Namespace Prefix: | snh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of real estate properties serving as a collateral for debt, as of the balance sheet date. + References No definition available. + Details
Name: | snh_NumberOfRealEstatePropertiesCollateralized
Namespace Prefix: | snh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower and amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + References No definition available. + Details
Name: | snh_SecuredDebtAndCapitalLeaseObligations
Namespace Prefix: | snh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after accumulated amortization, of debt discount (premium). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28567-108399 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 + Details
Name: | us-gaap_DeferredFinanceCostsGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- 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 Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_RealEstateInvestmentPropertyNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_SecuredDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=snh_MedicalOfficeBuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=snh_SecuredDebtFinancingDue2026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=snh_Mortgage6.31DueOctober2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=snh_Mortgage6.24PercentDueOctober2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=snh_Mortgage4.47PercentDueOctober2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=snh_Mortgage4.69PercentDueJanuary2019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=snh_Mortgage3.79PercentDueJuly2019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=snh_Mortgage7.49PercentDueJanuary2022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=snh_Mortgages6.28PercentDueJuly2022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=snh_Mortgage4.85PercentDueOctober2022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=snh_Mortgage5.75PercentDueOctober2022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=snh_Mortgage6.64PercentDueJune2023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=snh_Mortgages3.53PercentDueAugust2026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=snh_Mortgages6.25PercentDueFebruary2033Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=snh_Mortgage4.44PercentDueJuly2043Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=snh_Mortgage4.38PercentDueSeptember2043Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=snh_Capitallease7.70PercentDueApril2026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=snh_JointVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |