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Real Estate Properties - Narrative (Details) $ in Thousands | 9 Months Ended
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Sep. 30, 2017 USD ($) hotel travelcenter | Sep. 30, 2016 USD ($)
Real Estate Properties [Line Items] |  |
Improvements to certain properties | $ 89,955 | $ 122,239
Hotels and travel centers |  |
Real Estate Properties [Line Items] |  |
Improvements to certain properties | 111,966 |
Increase (decrease) in annual minimum returns and rents | $ 7,132 |
Hotel |  |
Real Estate Properties [Line Items] |  |
Number of properties owned | hotel | 323 |
Number of properties acquired | hotel | 20 |
Travel centers |  |
Real Estate Properties [Line Items] |  |
Number of properties owned | travelcenter | 199 |
Number of properties acquired | travelcenter | 1 |

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- Definition Represents the number of properties acquired or agreed to be acquired by the entity. + References No definition available. + Details
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- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
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- Definition The cash outflow for acquisition of or capital improvements to properties held for investment (operating, managed, leased) or for use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Details
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