Quarterly report pursuant to Section 13 or 15(d)

BASIS OF PRESENTATION AND ACCOUNTING POLICY Narrative (Details)

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BASIS OF PRESENTATION AND ACCOUNTING POLICY Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Property, Plant and Equipment [Line Items]        
Increase in operating expense $ (122,773) $ 2,366 $ (128,105) $ (1,948)
Increase administrative and general expense 10,928 9,504 31,211 26,871
Increase in loss on impairment 117,018 0 117,018 0
Increase in income tax benefit (45,237) $ 69 $ (48,066) $ (2,177)
Adjustment        
Property, Plant and Equipment [Line Items]        
Increase in operating expense 200      
Increase administrative and general expense 700      
Increase in loss on impairment 300      
Increase in income tax benefit $ 900