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Business Segment Information - Summarized Financial Information of Segments (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Segment Reporting Information [Line Items]      
Total revenues $ 130,283 $ 180,387  
Operating income (loss) (75,215) (33,635)  
Other income (expense) (16,869) 8,218  
Loss before income taxes (92,084) (25,417)  
Property, plant and equipment, net 5,177,169   $ 5,218,242
Total assets 5,560,268   5,649,375
Assets held for sale 25,845   26,728
Exploration and Production [Member]      
Segment Reporting Information [Line Items]      
Total revenues 117,315 173,859  
Well Services [Member]      
Segment Reporting Information [Line Items]      
Total revenues 30,888 50,905  
Midstream Services [Member]      
Segment Reporting Information [Line Items]      
Total revenues 29,818 17,642  
Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Total revenues 130,283 180,387  
Operating income (loss) (75,215) (33,635)  
Other income (expense) (16,869) 8,218  
Loss before income taxes (92,084) (25,417)  
Property, plant and equipment, net 5,177,169   5,218,242
Total assets [1] 5,560,268   5,649,375
Operating Segments [Member] | Exploration and Production [Member]      
Segment Reporting Information [Line Items]      
Total revenues 117,315 173,859  
Operating income (loss) (88,877) (42,247)  
Other income (expense) (16,887) 8,239  
Loss before income taxes (105,764) (34,008)  
Property, plant and equipment, net 4,994,366   5,057,311
Total assets [1] 5,367,881   5,478,439
Assets held for sale 25,800   26,700
Operating Segments [Member] | Well Services [Member]      
Segment Reporting Information [Line Items]      
Total revenues 5,985 2,708  
Operating income (loss) 4,006 9,610  
Other income (expense) 5 (2)  
Loss before income taxes 4,011 9,608  
Property, plant and equipment, net 57,821   61,402
Total assets [1] 62,076   66,952
Operating Segments [Member] | Midstream Services [Member]      
Segment Reporting Information [Line Items]      
Total revenues 6,983 3,820  
Operating income (loss) 15,144 9,308  
Other income (expense) 13 (19)  
Loss before income taxes 15,157 9,289  
Property, plant and equipment, net 295,913   264,956
Total assets [1] 301,242   269,411
Assets held for sale 34    
Segment Reconciling Items [Member] | Exploration and Production [Member]      
Segment Reporting Information [Line Items]      
Total revenues 0 0  
Segment Reconciling Items [Member] | Well Services [Member]      
Segment Reporting Information [Line Items]      
Total revenues 24,903 48,197  
Segment Reconciling Items [Member] | Midstream Services [Member]      
Segment Reporting Information [Line Items]      
Total revenues 22,835 13,822  
Intersegment Eliminations [Member]      
Segment Reporting Information [Line Items]      
Total revenues (47,738) (62,019)  
Operating income (loss) (5,488) (10,306)  
Other income (expense) 0 0  
Loss before income taxes (5,488) $ (10,306)  
Property, plant and equipment, net (170,931)   (165,427)
Total assets [1] $ (170,931)   $ (165,427)
[1] As of March 31, 2016, total assets included assets held for sale of $25.8 million in the exploration and production segment and $34,000 in the midstream services segment. As of December 31, 2015, total assets included assets held for sale of $26.7 million in the exploration and production segment (see Note 7 – Assets Held for Sale). For the periods presented, the intercompany receivables (payables) for all segments were reclassified to capital contributions from (distributions to) parent and not included in total assets.