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Related Person Transactions - Additional Information (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended
--- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2015
HPT |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Aggregate incentive business management fees | $ 74,572 | $ 52,407 |  |
SNH |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Aggregate incentive business management fees | 55,740 |  |  |
SIR |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Aggregate incentive business management fees | $ 25,569 |  |  |
ABP Trust and Managed REIT |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Rental expense |  |  | $ 1,028 | $ 1,050

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- Definition Represents the aggregate incentive business management fees. + References No definition available. + Details
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X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
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- 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
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- Details
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Namespace Prefix: |
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- Details
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- Details
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- Details
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