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CASH FLOW INFORMATION (Details) (USD $) | 12 Months Ended | 24 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2014
Cash paid for interest | $ 8,791,000 us-gaap_InterestPaid | $ 8,062,000 us-gaap_InterestPaid | $ 7,776,000 us-gaap_InterestPaid |
Cash paid for state income taxes | 51,000 us-gaap_IncomeTaxesPaid | 60,000 us-gaap_IncomeTaxesPaid | 48,000 us-gaap_IncomeTaxesPaid |
Hamilton Green |  |  |  |
Non-cash financing activities in connection with acquisition |  | 38,500,000 nen_NonCashFinancingActivityRelatedToAcquisition / dei_LegalEntityAxis = nen_HamiltonGreenApartmentsLLCMember |  |
NERA Dean Street Apartments And Westgate Apartments [Member] |  |  |  |
Non-cash financing activities in connection with acquisition |  |  |  | $ 7,077,000 nen_NonCashFinancingActivityRelatedToAcquisition / dei_LegalEntityAxis = nen_NeraDeanStreetApartmentsAndWestgateApartmentsMember

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- Definition Represents the value of acquisition in noncash financing activities. + References No definition available. + Details
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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The amount of cash paid for interest during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Details
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- Details
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