v3.4.0.3

PARTNERS' EQUITY Narrative (Details)	3 Months Ended
	Mar. 31, 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