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RELATED PARTY TRANSACTIONS (Tables)
 9 Months Ended
Sep. 30, 2013
Related Party Transactions [Abstract]  
Schedule of Related Party Transactions [Text Block]
The following table summarizes information pertaining to related party transactions:
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2013
 
2012
 
2013
 
2012
 
(Thousands of Dollars)
Expenses for payroll, employee benefit plans
      and unit-based compensation
$
42,736

 
$
56,067

 
$
141,933

 
$
166,385

Other expenses
$
167

 
$
165

 
$
344

 
$
351