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Business Segment Information - Summarized Financial Information of Segments (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Segment Reporting Information [Line Items]          
Total revenues $ 179,080 $ 230,046 $ 309,363 $ 410,433  
Operating income (loss) (28,214) (7,437) (103,429) (41,072)  
Other income (expense) (114,215) (76,638) (131,084) (68,420)  
Loss before income taxes (142,429) (84,075) (234,513) (109,492)  
Property, plant and equipment, net 5,186,734   5,186,734   $ 5,218,242
Total assets 5,435,539   5,435,539   5,649,375
Assets held for sale 0   0   26,728
Exploration and Production [Member]          
Segment Reporting Information [Line Items]          
Total revenues 159,337 214,110 276,652 387,969  
Well Services [Member]          
Segment Reporting Information [Line Items]          
Total revenues 21,135 58,688 52,023 109,593  
Midstream Services [Member]          
Segment Reporting Information [Line Items]          
Total revenues 28,935 28,661 58,753 46,303  
Operating Segments [Member]          
Segment Reporting Information [Line Items]          
Total revenues 179,080 230,046 309,363 410,433  
Operating income (loss) (28,214) (7,437) (103,429) (41,072)  
Other income (expense) (114,215) (76,638) (131,084) (68,420)  
Loss before income taxes (142,429) (84,075) (234,513) (109,492)  
Property, plant and equipment, net 5,186,734   5,186,734   5,218,242
Total assets [1] 5,435,539   5,435,539   5,649,375 [2]
Operating Segments [Member] | Exploration and Production [Member]          
Segment Reporting Information [Line Items]          
Total revenues 159,337 214,110 276,652 387,969  
Operating income (loss) (44,748) (22,529) (133,625) (64,776)  
Other income (expense) (114,230) (76,635) (131,119) (68,396)  
Loss before income taxes (158,978) (99,164) (264,744) (133,172)  
Property, plant and equipment, net 4,951,972   4,951,972   5,057,311
Total assets [1] 5,191,725   5,191,725   5,478,439 [2]
Assets held for sale         26,700
Operating Segments [Member] | Well Services [Member]          
Segment Reporting Information [Line Items]          
Total revenues 12,834 9,219 18,818 11,927  
Operating income (loss) (2,173) 9,008 1,848 18,618  
Other income (expense) 31 22 37 20  
Loss before income taxes (2,142) 9,030 1,885 18,638  
Property, plant and equipment, net 53,926   53,926   61,402
Total assets [1] 57,482   57,482   66,952 [2]
Operating Segments [Member] | Midstream Services [Member]          
Segment Reporting Information [Line Items]          
Total revenues 6,909 6,717 13,893 10,537  
Operating income (loss) 18,056 15,947 33,200 25,255  
Other income (expense) (16) (25) (2) (44)  
Loss before income taxes 18,040 15,922 33,198 25,211  
Property, plant and equipment, net 351,116   351,116   264,956
Total assets [1] 356,612   356,612   269,411 [2]
Segment Reconciling Items [Member] | Exploration and Production [Member]          
Segment Reporting Information [Line Items]          
Total revenues 0 0 0 0  
Segment Reconciling Items [Member] | Well Services [Member]          
Segment Reporting Information [Line Items]          
Total revenues 8,301 49,469 33,205 97,666  
Segment Reconciling Items [Member] | Midstream Services [Member]          
Segment Reporting Information [Line Items]          
Total revenues 22,026 21,944 44,860 35,766  
Intersegment Eliminations [Member]          
Segment Reporting Information [Line Items]          
Total revenues (30,327) (71,413) (78,065) (133,432)  
Operating income (loss) 651 (9,863) (4,852) (20,169)  
Other income (expense) 0 0 0 0  
Loss before income taxes 651 $ (9,863) (4,852) $ (20,169)  
Property, plant and equipment, net (170,280)   (170,280)   (165,427)
Total assets [1] $ (170,280)   $ (170,280)   $ (165,427) [2]
[1] Intercompany receivables (payables) for all segments were reclassified to capital contributions from (distributions to) parent and not included in total assets.
[2] At December 31, 2015, total assets included assets held for sale of $26.7 million in the exploration and production segment related to the assets sold as of April 1, 2016 (see Note 7 – Divestiture).