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).