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Pro Forma Financial Information (Details)	9 Months Ended
	Sep. 30, 2015 Property
Business Combinations [Abstract]
Number of acquired hotel properties	5

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- 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