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MEMBERS' EQUITY (Tables)
 12 Months Ended
Dec. 31, 2017
Members' Equity [Abstract]  
Schedule of Accumulated Other Comprehensive Loss
The following table presents changes in accumulated other comprehensive loss by component:
 
Share of
NuStar
Energy’s Other
Comprehensive
(Loss) Income
 
Pension and
Other
Postretirement
Benefit Plan
Adjustments
 
Total
 
(Thousands of Dollars)
Balance as of January 1, 2015
$
(10,082
)
 
$
4,307

 
$
(5,775
)
Other comprehensive (loss) income before reclassification adjustments
(3,107
)
 
1,312

 
(1,795
)
Amounts reclassified to general and administrative expenses (a)
—

 
(1,094
)
 
(1,094
)
Other comprehensive (loss) income
(3,107
)
 
218

 
(2,889
)
Balance as of December 31, 2015
(13,189
)
 
4,525

 
(8,664
)
Other comprehensive loss before reclassification adjustments
(685
)
 
—

 
(685
)
Amounts reclassified to general and administrative expenses (a)
—

 
(324
)
 
(324
)
Employee Transfer (b)
—

 
(4,201
)
 
(4,201
)
Other comprehensive loss
(685
)
 
(4,525
)
 
(5,210
)
Balance as of December 31, 2016
(13,874
)
 
—

 
(13,874
)
Other comprehensive income before reclassification adjustments
3,052

 
—

 
3,052

Balance as of December 31, 2017
$
(10,822
)
 
$
—

 
$
(10,822
)

(a)
These amounts are components of net periodic pension cost (income), and prior to the Employee Transfer on March 1, 2016, NuStar Energy reimbursed us for these employee costs.
(b)
Represents the balance of accumulated other comprehensive loss related to the unrecognized components of net periodic benefit cost (income), net of income taxes of $2.4 million, that was transferred to NuStar Services Co in connection with the Employee Transfer as described in Note 5.
Our cash distributions applicable to the period in which the distributions were earned
The following table summarizes our cash distributions applicable to the period in which the distributions were earned:
 
Year Ended December 31,
 
2017
 
2016
 
2015
 
(Thousands of Dollars, Except Per Unit Data)
Cash distributions per unit
$
2.18

 
$
2.18

 
$
2.18

Total cash distributions
$
93,649

 
$
93,601

 
$
93,561
Distributions Made to Limited Liability Company (LLC) Member, by Distribution
The following table summarizes information related to our quarterly cash distributions:
Quarter Ended
 
Cash Distributions Per Unit
 
Total Cash Distributions
 
Record Date
 
Payment Date
 
 
 
 
(Thousands of Dollars)
 
 
 
 
December 31, 2017 (a)
 
$
0.545

 
$
23,423

 
February 8, 2018
 
February 15, 2018
September 30, 2017
 
$
0.545

 
$
23,409

 
November 9, 2017
 
November 16, 2017
June 30, 2017
 
$
0.545

 
$
23,408

 
August 7, 2017
 
August 15, 2017
March 31, 2017
 
$
0.545

 
$
23,409

 
May 8, 2017
 
May 16, 2017
(a)
The distribution was announced on January 29, 2018.