XML 48 R21.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Organization and Basis of Presentation (Details) (Wholly Owned or Hold Equity Interest [Member]) | 3 Months Ended
--- | ---
Mar. 31, 2014 Counterparty Property
Office Building [Member] |
Real Estate Properties [Line Items] |
Number of properties | 11
Industrial Building [Member] |
Real Estate Properties [Line Items] |
Number of properties | 1
Office Properties [Member] |
Real Estate Properties [Line Items] |
Rentable square feet | 786,000
Retail Shopping Center [Member] |
Real Estate Properties [Line Items] |
Number of properties | 4
Rentable square feet | 186,000
Self Storage Facility [Member] |
Real Estate Properties [Line Items] |
Number of properties | 7
Rentable square feet | 652,000
Model Home [Member] |
Real Estate Properties [Line Items] |
Number of properties | 81
Number of limited partnership owners | 4

X
- Definition The number of limited partnership owners of Model Homes. + References No definition available. + Details
Name: | netr_NumberOfLimitedPartnershipOwners
Namespace Prefix: | netr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstateProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_RealEstatePropertiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration