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RELATED PARTY TRANSACTIONS (Tables)
 12 Months Ended
Dec. 31, 2013
Related Party Transactions [Abstract]  
Schedule of total related party transactions
The following table summarizes information pertaining to related party transactions:
 
Year Ended December 31,
 
2013
 
2012
 
2011
 
(Thousands of Dollars)
Expenses for payroll, employee benefit plans and unit-based compensation
$
190,643

 
$
225,135

 
$
216,380

Other expenses
$
434

 
$
437

 
$
402