MERGER	6 Months Ended
Jun. 30, 2018
Business Combinations [Abstract]
MERGER AGREEMENT	MERGER On February 7, 2018, NuStar Energy, Riverwalk Logistics, L.P., NuStar GP, LLC, Marshall Merger Sub LLC, a wholly owned subsidiary of NuStar Energy (Merger Sub), Riverwalk Holdings, LLC and NuStar GP Holdings entered into an Agreement and Plan of Merger (the Merger Agreement). Pursuant to the Merger Agreement, Merger Sub merged with and into NuStar GP Holdings with NuStar GP Holdings being the surviving entity (the Merger), such that NuStar Energy is the sole member of NuStar GP Holdings following the Merger (refer to the next two pages for charts depicting our organizational structure before and after the Merger). The Merger closed on July 20, 2018. Pursuant to the Merger Agreement and at the effective time of the Merger, NuStar Energy’s partnership agreement was amended and restated to, among other things, (i) cancel the incentive distribution rights held by our general partner, (ii) convert the 2% general partner interest in NuStar Energy held by our general partner into a non-economic management interest and (iii) provide the holders of our common units with voting rights in the election of the members of the board of directors of NuStar GP, LLC at an annual meeting, beginning in 2019. At the effective time of the Merger, each outstanding NuStar GP Holdings common unit was converted into the right to receive 0.55 of a NuStar Energy common unit and all NuStar GP Holdings common units ceased to be outstanding. No fractional NuStar Energy common units were issued in the Merger; instead, each holder of NuStar GP Holdings’ common units otherwise entitled to receive a fractional NuStar Energy common unit is receiving cash in lieu thereof. As a result of the Merger, we issued approximately 23.6 million NuStar Energy common units and cancelled the 10.2 million NuStar Energy common units owned by subsidiaries of NuStar GP Holdings, resulting in approximately 13.4 million incremental NuStar Energy common units outstanding after the Merger. Also at the effective time of the Merger, each outstanding award of NuStar GP Holdings restricted units was converted, on the same terms and conditions as were applicable to the awards immediately prior to the Merger, into an award of NuStar Energy restricted units. The number of NuStar Energy restricted units subject to the converted awards was determined pursuant to the 0.55 exchange ratio provided in the Merger Agreement. Following the completion of the Merger, the NuStar GP, LLC board of directors consists of nine members, currently composed of the six members of the NuStar GP, LLC board of directors prior to the Merger and the three independent directors who served prior to the Merger on NuStar GP Holdings’ board of directors. We plan to account for the Merger as an equity transaction similar to a redemption or induced conversion of preferred stock. The excess of (1) the fair value of the consideration transferred in exchange for the outstanding NSH units over (2) the carrying value of the general partner interest in the Partnership will be subtracted from net income available to common unitholders in the calculation of net income per unit. The consideration transferred includes the fair value of the incremental NS units issued, assumed NSH debt of $51.5 million and estimated transaction costs of approximately $10.0 million, resulting in an estimated reduction of $3.55 per common unit in the third quarter of 2018. The following chart depicts a summary of our organizational structure at June 30, 2018, before the Merger: The following chart depicts a summary of our organizational structure after the Merger:

MERGER

On February 7, 2018, NuStar Energy, Riverwalk Logistics, L.P., NuStar GP, LLC, Marshall Merger Sub LLC, a wholly owned subsidiary of NuStar Energy (Merger Sub), Riverwalk Holdings, LLC and NuStar GP Holdings entered into an Agreement and Plan of Merger (the Merger Agreement). Pursuant to the Merger Agreement, Merger Sub merged with and into NuStar GP Holdings with NuStar GP Holdings being the surviving entity (the Merger), such that NuStar Energy is the sole member of NuStar GP Holdings following the Merger (refer to the next two pages for charts depicting our organizational structure before and after the Merger). The Merger closed on July 20, 2018. Pursuant to the Merger Agreement and at the effective time of the Merger, NuStar Energy’s partnership agreement was amended and restated to, among other things, (i) cancel the incentive distribution rights held by our general partner, (ii) convert the 2% general partner interest in NuStar Energy held by our general partner into a non-economic management interest and (iii) provide the holders of our common units with voting rights in the election of the members of the board of directors of NuStar GP, LLC at an annual meeting, beginning in 2019.

At the effective time of the Merger, each outstanding NuStar GP Holdings common unit was converted into the right to receive 0.55 of a NuStar Energy common unit and all NuStar GP Holdings common units ceased to be outstanding. No fractional NuStar Energy common units were issued in the Merger; instead, each holder of NuStar GP Holdings’ common units otherwise entitled to receive a fractional NuStar Energy common unit is receiving cash in lieu thereof. As a result of the Merger, we issued approximately 23.6 million NuStar Energy common units and cancelled the 10.2 million NuStar Energy common units owned by subsidiaries of NuStar GP Holdings, resulting in approximately 13.4 million incremental NuStar Energy common units outstanding after the Merger.

Also at the effective time of the Merger, each outstanding award of NuStar GP Holdings restricted units was converted, on the same terms and conditions as were applicable to the awards immediately prior to the Merger, into an award of NuStar Energy restricted units. The number of NuStar Energy restricted units subject to the converted awards was determined pursuant to the 0.55 exchange ratio provided in the Merger Agreement.

Following the completion of the Merger, the NuStar GP, LLC board of directors consists of nine members, currently composed of the six members of the NuStar GP, LLC board of directors prior to the Merger and the three independent directors who served prior to the Merger on NuStar GP Holdings’ board of directors.

We plan to account for the Merger as an equity transaction similar to a redemption or induced conversion of preferred stock. The excess of (1) the fair value of the consideration transferred in exchange for the outstanding NSH units over (2) the carrying value of the general partner interest in the Partnership will be subtracted from net income available to common unitholders in the calculation of net income per unit. The consideration transferred includes the fair value of the incremental NS units issued, assumed NSH debt of $51.5 million and estimated transaction costs of approximately $10.0 million, resulting in an estimated reduction of $3.55 per common unit in the third quarter of 2018.

The following chart depicts a summary of our organizational structure at June 30, 2018, before the Merger:

The following chart depicts a summary of our organizational structure after the Merger: