INVESTMENT IN NUSTAR ENERGY Narrative (Details) - NuStar Energy [Member] - Linden Acquisition [Member]	Jan. 02, 2015
Schedule of Equity Method Investments [Line Items]
Equity method investment acquisition, ownership interest before transaction	50.00%
Equity method investment acquisition, ownership interest after transaction	100.00%

Percentage of equity investee's and equity investee's joint venture partner stock owned by the equity method investee prior to the equity method investee's business acquisition.

No definition available.

Name:	nsh_EquityMethodInvestmentBusinessAcquisitionOwnershipInterestPriorToTransaction
Namespace Prefix:	nsh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant