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EMPLOYEE BENEFIT PLANS AND LONG-TERM INCENTIVE PLANS (Tables)
12 Months Ended
Dec. 31, 2013
EMPLOYEE BENEFIT PLANS AND LONG-TERM INCENTIVE PLANS [Abstract]  
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]
The number of awards granted under the above-described plans were as follows:
 
Year Ended December 31,
 
2013
 
2012
 
2011
 
Granted
 
Vesting
 
Granted
 
Vesting
 
Granted
 
Vesting
2000 LTIP:
 
 
 
 
 
 
 
 
 
 
 
Performance awards
38,786

 
(a)

 
33,445

 
(a)
 
27,111

 
(a)
Restricted units (b)
269,182

 
1/5 per year

 
231,855

 
1/5 per year
 
208,195

 
1/5 per year
Restricted units (grants to non-employee directors of NuStar GP, LLC)
8,904

 
1/3 per year

 
8,170

 
1/3 per year
 
6,760

 
1/3 per year
UIP:
 
 
 
 
 
 
 
 
 
 
 
Restricted units (c)

 

 
15,382

 
1/5 per year
 
14,005

 
1/5 per year
2006 LTIP:
 
 
 
 
 
 
 
 
 
 
 
Restricted units
18,620

 
1/5 per year

 
25,640

 
1/5 per year
 
24,970

 
1/5 per year
Restricted units (grants to non-employee directors of NuStar GP Holdings) (d)
13,183

 
1/3 per year

 
10,601

 
1/3 per year
 
9,987

 
1/3 per year
 
(a)
Performance awards vest 1/3 per year if certain performance measures are met.
(b)
The 2000 LTIP restricted unit grants include 3,882 restricted unit awards granted to certain international employees for the year ended December 31, 2013, that vest 1/3 per year , as defined in the award agreements.
(c)
The UIP restricted unit grants include 3,392 and 2,880 restricted unit awards granted to certain international employees for the years ended December 31, 2012 and 2011, respectively, that vest 1/3 per year , as defined in the award agreements.
(d)
We do not reimburse NuStar GP, LLC for compensation expense relating to these awards.
Schedule of Compensation Expense for Long Term Incentive Plans and Benefit Plans [Table Text Block]
Our share of compensation expense related to the various long-term incentive plans and benefit plans described above is as follows: 
 
Year Ended December 31,
 
2013
 
2012
 
2011
 
(Thousands of Dollars)
Long-term incentive plans
$
9,818

 
$
7,745

 
$
8,521

Benefit plans
$
18,204

 
$
23,602

 
$
13,684