XML 63 R27.htm IDEA: XBRL DOCUMENT
v2.4.0.6

PARTNERS' CAPITAL (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2012
PARTNERS' CAPITAL |
Schedule of information per depositary receipt |
|  | Six Months Ended June 30, |
|  | 2012 |  | 2011 |
Income per Depositary Receipt before Discontinued Operations |  | $ | 0.42 |  | $ | 0.12 |
Income from Discontinued Operations |  | — |  | 1.98 |
Net Income per Depositary Receipt after Discontinued Operations |  | $ | 0.42 |  | $ | 2.10 |
Distributions per Depositary Receipt |  | $ | 0.50 |  | $ | 0.46 |

X
- Definition Tabular disclosure of information related to income (loss) and distributions per depository receipt. + References No definition available. + Details
Name: | nen_ScheduleOfIncomeLossAndDistributionPerDepositoryReceiptTableTextBlock
Namespace Prefix: | nen_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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