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Business Segment Information - Summarized Financial Information of Segments (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Segment Reporting Information [Line Items]          
Total revenues $ 304,748 $ 177,311 $ 843,955 $ 486,674  
Operating income 32,394 (25,702) 57,865 (129,131)  
Other income (expense) (92,304) (24,931) (59,006) (156,015)  
Loss before income taxes (59,910) (50,633) (1,141) (285,146)  
Property, plant and equipment, net 6,035,618   6,035,618   $ 5,919,567
Total assets 6,391,212   6,391,212   6,178,632
Exploration and Production [Member]          
Segment Reporting Information [Line Items]          
Total revenues 269,843 158,183 761,450 434,835  
Midstream Services [Member]          
Segment Reporting Information [Line Items]          
Total revenues 47,660 29,277 125,613 88,030  
Well Services [Member]          
Segment Reporting Information [Line Items]          
Total revenues 47,163 22,459 101,594 74,482  
Operating Segments [Member] | Exploration and Production [Member]          
Segment Reporting Information [Line Items]          
Total revenues 269,843 158,183 761,450 434,835  
Operating income 3,484 (41,857) (12,972) (175,480)  
Other income (expense) (92,319) (24,476) (59,027) (155,595)  
Loss before income taxes (88,835) (66,333) (71,999) (331,075)  
Property, plant and equipment, net 5,595,611   5,595,611   5,620,558
Total assets 5,930,040   5,930,040   5,868,747
Operating Segments [Member] | Midstream Services [Member]          
Segment Reporting Information [Line Items]          
Total revenues 18,767 8,487 48,939 22,380  
Operating income 25,194 16,525 69,059 49,724  
Other income (expense) (15) (460) (13) (462)  
Loss before income taxes 25,179 16,065 69,046 49,262  
Property, plant and equipment, net 577,883   577,883   424,197
Total assets 589,506   589,506   431,095
Operating Segments [Member] | Well Services [Member]          
Segment Reporting Information [Line Items]          
Total revenues 16,138 10,641 33,566 29,459  
Operating income 10,802 1,572 9,161 3,420  
Other income (expense) 30 5 34 42  
Loss before income taxes 10,832 1,577 9,195 3,462  
Property, plant and equipment, net 43,175   43,175   47,189
Total assets 52,717   52,717   51,167
Segment Reconciling Items [Member] | Exploration and Production [Member]          
Segment Reporting Information [Line Items]          
Total revenues 0 0 0 0  
Segment Reconciling Items [Member] | Midstream Services [Member]          
Segment Reporting Information [Line Items]          
Total revenues 28,893 20,790 76,674 65,650  
Segment Reconciling Items [Member] | Well Services [Member]          
Segment Reporting Information [Line Items]          
Total revenues 31,025 11,818 68,028 45,023  
Intersegment Eliminations [Member]          
Segment Reporting Information [Line Items]          
Total revenues (59,918) (32,608) (144,702) (110,673)  
Operating income (7,086) (1,942) (7,383) (6,795)  
Other income (expense) 0 0 0 0  
Loss before income taxes (7,086) $ (1,942) (7,383) $ (6,795)  
Property, plant and equipment, net (181,051)   (181,051)   (172,377)
Total assets $ (181,051)   $ (181,051)   $ (172,377)