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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).

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