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Pro Forma Financial Information (Details) | 3 Months Ended
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Sep. 30, 2015 Property
Business Combinations [Abstract] |
Number of acquired hotel properties | 5

X
- Definition Number of hotel properties. + References No definition available. + Details
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Namespace Prefix: | netr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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