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BUSINESS SEGMENT INFORMATION (Tables)
 6 Months Ended
Jun. 30, 2017
BUSINESS SEGMENT INFORMATION  
Schedule of segment reporting information by segment
  Three months ended
June 30		  Six months ended
June 30		 
(in thousands) 2017  2016  2017  2016 
Revenues:                
Technical Services $385,462  $131,217  $671,660  $306,689 
Support Services  13,348   11,781   25,269   25,404 
Total revenues $398,810  $142,998  $696,929  $332,093 
Operating income (loss):                
Technical Services $70,901  $(65,690) $80,106  $(128,954)
Support Services  (3,339)  (7,163)  (8,560)  (13,799)
Corporate  (4,319)  (3,884)  (8,246)  (10,327)
Gain on disposition of assets, net  3,759   1,515   5,276   2,771 
Total operating income (loss) $67,002  $(75,222) $68,576  $(150,309)
Interest expense  (114)  (126)  (217)  (451)
Interest income  411   104   540   127 
Other income (expense), net  2,010   (154)  2,222   188 
Income (loss) before income taxes $69,309  $(75,398) $71,121  $(150,445)

 

As of and for the six months ended June 
30, 2017		 Technical
Services		  Support 
Services		  Corporate  Total 
(in thousands)            
Depreciation and amortization $76,242  $9,451  $233  $85,926 
Capital expenditures  25,282   5,165   198   30,645 
Identifiable assets $857,482  $75,117  $173,286  $1,105,885 

 

As of and for the six months ended June
30, 2016		 Technical
Services		  Support 
Services		  Corporate  Total 
(in thousands)            
Depreciation and amortization $103,227  $13,452  $237  $116,916 
Capital expenditures  15,213   1,557   1,519   18,289 
Identifiable assets $778,075  $86,588  $226,614  $1,091,277