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Real Estate Properties - Narrative (Details) $ in Thousands	9 Months Ended
	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

X

- Definition

Represents the increase or decrease in the annual minimum returns and rents the lessee or manager is obligated to pay under the operating agreement.

+ References

No definition available.

+ Details

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X

- Definition

Represents the number of properties acquired or agreed to be acquired by the entity.

+ References

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+ Details

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X

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
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X

- 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

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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.

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- Details

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- Details

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- Details

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