v2.4.0.6
ACCRUED LIABILITIES (Tables)
12 Months Ended
Dec. 31, 2011
Accrued Liabilities [Abstract]
Schedule of Accrued Liabilities [Table Text Block]
Accrued liabilities consisted of the following:
December 31,
2011
2010
(Thousands of Dollars)
Employee wages and benefit costs
$
24,325
$
21,216
Derivative liabilities
27,433
14,741
Unearned income
8,866
4,375
Environmental costs
3,312
2,659
Product imbalances
1,469
988
Other
5,865
13,974
Accrued liabilities
$
71,270
$
57,953
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Tabular disclosure of the components of accrued liabilities.
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