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Business Segment Information - Summarized Financial Information of Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Total revenues |  | $ 177,311 | $ 197,235 | $ 486,674 | $ 607,668 |  |
Operating income (loss) |  | (25,702) | (19,926) | (129,131) | (60,998) |  |
Other income (expense) |  | (24,931) | 67,373 | (156,015) | (1,047) |  |
Income (loss) before income taxes |  | (50,633) | 47,447 | (285,146) | (62,045) |  |
Property, plant and equipment, net |  | 5,152,673 |  | 5,152,673 |  | $ 5,218,242 |
Total assets |  | 5,398,261 |  | 5,398,261 |  | 5,649,375 |
Assets held for sale |  | 0 |  | 0 |  | 26,728 |
Exploration and Production [Member] |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Total revenues |  | 158,183 | 175,270 | 434,835 | 563,239 |  |
Well Services [Member] |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Total revenues |  | 22,459 | 48,935 | 74,482 | 158,528 |  |
Midstream Services [Member] |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Total revenues |  | 29,277 | 29,812 | 88,030 | 76,115 |  |
Operating Segments [Member] |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Total revenues |  | 177,311 | 197,235 | 486,674 | 607,668 |  |
Operating income (loss) |  | (25,702) | (19,926) | (129,131) | (60,998) |  |
Other income (expense) |  | (24,931) | 67,373 | (156,015) | (1,047) |  |
Income (loss) before income taxes |  | (50,633) | 47,447 | (285,146) | (62,045) |  |
Property, plant and equipment, net |  | 5,152,673 |  | 5,152,673 |  | 5,218,242 |
Total assets | [1] | 5,398,261 |  | 5,398,261 |  | 5,649,375 | [2]
Operating Segments [Member] | Exploration and Production [Member] |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Total revenues |  | 158,183 | 175,270 | 434,835 | 563,239 |  |
Operating income (loss) |  | (41,857) | (38,289) | (175,480) | (103,065) |  |
Other income (expense) |  | (24,476) | 67,359 | (155,595) | (1,037) |  |
Income (loss) before income taxes |  | (66,333) | 29,070 | (331,075) | (104,102) |  |
Property, plant and equipment, net |  | 4,883,137 |  | 4,883,137 |  | 5,057,311 |
Total assets | [1] | 5,120,567 |  | 5,120,567 |  | 5,478,439 | [2]
Assets held for sale |  |  |  |  |  | 26,700 |
Operating Segments [Member] | Well Services [Member] |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Total revenues |  | 10,641 | 15,381 | 29,459 | 27,308 |  |
Operating income (loss) |  | 1,572 | 10,936 | 3,420 | 29,554 |  |
Other income (expense) |  | 5 | 14 | 42 | 34 |  |
Income (loss) before income taxes |  | 1,577 | 10,950 | 3,462 | 29,588 |  |
Property, plant and equipment, net |  | 50,477 |  | 50,477 |  | 61,402 |
Total assets | [1] | 53,235 |  | 53,235 |  | 66,952 | [2]
Operating Segments [Member] | Midstream Services [Member] |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Total revenues |  | 8,487 | 6,584 | 22,380 | 17,121 |  |
Operating income (loss) |  | 16,525 | 18,828 | 49,724 | 44,083 |  |
Other income (expense) |  | (460) | 0 | (462) | (44) |  |
Income (loss) before income taxes |  | 16,065 | 18,828 | 49,262 | 44,039 |  |
Property, plant and equipment, net |  | 391,282 |  | 391,282 |  | 264,956 |
Total assets | [1] | 396,682 |  | 396,682 |  | 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 |  | 11,818 | 33,554 | 45,023 | 131,220 |  |
Segment Reconciling Items [Member] | Midstream Services [Member] |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Total revenues |  | 20,790 | 23,228 | 65,650 | 58,994 |  |
Intersegment Eliminations [Member] |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Total revenues |  | (32,608) | (56,782) | (110,673) | (190,214) |  |
Operating income (loss) |  | (1,942) | (11,401) | (6,795) | (31,570) |  |
Other income (expense) |  | 0 | 0 | 0 | 0 |  |
Income (loss) before income taxes |  | (1,942) | $ (11,401) | (6,795) | $ (31,570) |  |
Property, plant and equipment, net |  | (172,223) |  | (172,223) |  | (165,427) |
Total assets | [1] | $ (172,223) |  | $ (172,223) |  | $ (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).

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