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DISPOSITIONS (Tables)
 12 Months Ended
Dec. 31, 2015
Discontinued Operations and Disposal Groups [Abstract]  
Details of Impairment of Long-Lived Assets Held For Sale by Asset [Table Text Block]
The impairment loss consisted of the following (in thousands of dollars):
Property, plant and equipment, net
$
68,213

Intangible assets, net (customer relationships)
6,856

Goodwill
27,460

Asset impairment loss
$
102,529
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]
The following table summarizes the results from discontinued operations:
 
Year Ended December 31,
 
2015
 
2014
 
2013
 
(Thousands of Dollars)
Revenues
$
208

 
$
4,265

 
$
7,758

Income (loss) before income tax expense
$
774

 
$
(3,791
)
 
$
(106,033
)