v3.5.0.2

PARTNERS' EQUITY Narrative (Details) | 6 Months Ended
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Jun. 30, 2016
Equity [Abstract] |
Percentage of incentive cash distributions allocated to the general partner | 100.00%

X
- Definition The percentage of incentive cash distributions allocated to the general partner. + References No definition available. + Details
Name: | ns_PercentageofIncentiveCashDistributionsAllocatedtotheGeneralPartner
Namespace Prefix: | ns_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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