v2.4.0.6
RELATED PARTY TRANSACTIONS (Tables)
12 Months Ended
Dec. 31, 2011
Related Party Transactions [Abstract]  
Schedule of Related Party Transactions [Text Block]
The following table summarizes information pertaining to related party transactions:
 
Year Ended December 31,
 
2011
 
2010
 
2009
 
(Thousands of Dollars)
Revenues
$
1,039

 
$

 
$

Operating expenses
$
150,159

 
$
137,634

 
$
124,827

General and administrative expenses
$
66,623

 
$
71,554

 
$
58,878