CREDIT FACILITY	12 Months Ended
Dec. 31, 2017
Line of Credit Facility [Abstract]
CREDIT FACILITY	CREDIT FACILITY Our revolving credit facility dated June 28, 2013 currently has a borrowing capacity of up to $60.0 million, of which up to $10.0 million may be available for letters of credit. We amended this facility on June 27, 2017 to, among other things, extend its maturity to June 27, 2018 and increase its borrowing capacity from $50.0 million to $60.0 million. Our obligations under our revolving credit facility are guaranteed by Riverwalk Holdings, LLC (Riverwalk), our wholly owned subsidiary. Riverwalk has pledged a total of 2,926,833 NuStar Energy common units that it owns to secure its guarantee. Borrowings under our revolving credit facility are used to fund capital contributions to NuStar Energy, to maintain our 2% general partner interest when NuStar Energy issues additional common units and to meet other liquidity and capital resource requirements. As of December 31, 2017, we had outstanding borrowings of $42.5 million and availability of $17.5 million for borrowings under our revolving credit facility. Interest on our revolving credit facility is based upon, at our option, either an alternative base rate or a LIBOR-based rate. The weighted-average interest rates related to borrowings under our revolving credit facility as of December 31, 2017 and 2016 were 3.6% and 2.8%, respectively. As of December 31, 2017 and 2016, unamortized deferred debt costs associated with our revolving credit agreement totaled $0.1 million and are included in “Prepaid expenses and other current assets” on our consolidated balance sheets. The revolving credit facility contains customary restrictive covenants, such as limitations on indebtedness, liens, dispositions of material property, mergers, asset transfers and certain investing activities. In addition, the revolving credit facility requires NuStar Energy to comply with the financial covenant contained in NuStar Logistics revolving credit facility. We are also required to receive cash distributions each fiscal quarter of at least $19.0 million in respect of our ownership interests in NuStar Energy. Our management believes that we are in compliance with the covenants of our revolving credit facility as of December 31, 2017.

CREDIT FACILITY

Our revolving credit facility dated June 28, 2013 currently has a borrowing capacity of up to $60.0 million, of which up to $10.0 million may be available for letters of credit. We amended this facility on June 27, 2017 to, among other things, extend its maturity to June 27, 2018 and increase its borrowing capacity from $50.0 million to $60.0 million. Our obligations under our revolving credit facility are guaranteed by Riverwalk Holdings, LLC (Riverwalk), our wholly owned subsidiary. Riverwalk has pledged a total of 2,926,833 NuStar Energy common units that it owns to secure its guarantee. Borrowings under our revolving credit facility are used to fund capital contributions to NuStar Energy, to maintain our 2% general partner interest when NuStar Energy issues additional common units and to meet other liquidity and capital resource requirements.

As of December 31, 2017, we had outstanding borrowings of $42.5 million and availability of $17.5 million for borrowings under our revolving credit facility. Interest on our revolving credit facility is based upon, at our option, either an alternative base rate or a LIBOR-based rate. The weighted-average interest rates related to borrowings under our revolving credit facility as of December 31, 2017 and 2016 were 3.6% and 2.8%, respectively. As of December 31, 2017 and 2016, unamortized deferred debt costs associated with our revolving credit agreement totaled $0.1 million and are included in “Prepaid expenses and other current assets” on our consolidated balance sheets.

The revolving credit facility contains customary restrictive covenants, such as limitations on indebtedness, liens, dispositions of material property, mergers, asset transfers and certain investing activities. In addition, the revolving credit facility requires NuStar Energy to comply with the financial covenant contained in NuStar Logistics revolving credit facility. We are also required to receive cash distributions each fiscal quarter of at least $19.0 million in respect of our ownership interests in NuStar Energy. Our management believes that we are in compliance with the covenants of our revolving credit facility as of December 31, 2017.