Revision of Previously Issued Financial Statements - Consolidated Statement of Operations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended			6 Months Ended	9 Months Ended
		Sep. 30, 2017	Jun. 30, 2017	Sep. 30, 2016	Jun. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
Operating costs and expenses
Impairment of oil and gas properties			$ 148,016		$ 148,016	$ 148,016
Total operating expenses		$ 68,609	221,191	$ 53,917	275,931	344,540	$ 169,765
Operating income (loss)		(24,407)	(172,565)	(20,564)	(186,072)	(210,479)	(81,410)
Other income (expense)
Other income (expense)		(13,692)	27,501	364	28,081	14,389	251
Other income (expense), net		(59,048)	36,351	(8,414)	46,364	(12,684)	40,615
Income (loss) before income tax		(83,455)	(136,214)	(28,978)	(139,708)	(223,163)	(40,795)
Income tax provision (benefit)		(492)	(2,236)	(6,549)	(2,215)	(2,707)	(8,234)
Net income (loss)		(82,963)	(133,978)	(22,429)	(137,493)	(220,456)	(32,561)
Net income (loss) attributable to non-controlling interests		(18,157)	(51,762)	(12,576)	(53,890)	(72,047)	(18,374)
Net income (loss) attributable to controlling interests		(64,806)	(82,216)	(9,853)	(83,603)	(148,409)	(14,187)
Net income (loss) attributable to common shareholders		$ (66,772)	$ (84,182)	$ (10,618)	$ (87,596)	$ (154,368)	$ (14,952)
Earnings (loss) per share:
Basic - Net income (loss) attributable to common shareholders (in dollars per share)	[1]	$ (0.91)	$ (1.28)	$ (0.24)	$ (1.37)	$ (2.30)	$ (0.40)
Diluted - Net income (loss) attributable to common shareholders (in dollars per share)	[1]	$ (0.91)	$ (1.28)	$ (0.24)	$ (1.37)	$ (2.30)	$ (0.40)
Weighted average Class A shares outstanding:
Basic (in shares)	[1]	73,089	65,681	44,993	63,948	67,029	37,299
Diluted (in shares)	[1]	73,089	65,681	44,993	63,948	67,029	37,299
As filed
Operating costs and expenses
Impairment of oil and gas properties			$ 161,886		$ 161,886
Total operating expenses			235,061		289,801
Operating income (loss)			(186,435)		(199,942)
Other income (expense)
Other income (expense)			29,834		30,414
Other income (expense), net			38,684		48,697
Income (loss) before income tax			(147,751)		(151,245)
Income tax provision (benefit)			(2,419)		(2,398)
Net income (loss)			(145,332)		(148,847)
Net income (loss) attributable to non-controlling interests			(56,093)		(58,221)
Net income (loss) attributable to controlling interests			(89,239)		(90,626)
Net income (loss) attributable to common shareholders			$ (91,205)		$ (94,619)
Earnings (loss) per share:
Basic - Net income (loss) attributable to common shareholders (in dollars per share)	[1]		$ (1.39)		$ (1.48)
Diluted - Net income (loss) attributable to common shareholders (in dollars per share)	[1]		$ (1.39)		$ (1.48)
Weighted average Class A shares outstanding:
Basic (in shares)	[1]		65,681		63,948
Diluted (in shares)	[1]		65,681		63,948
Exclusion of certain prior asset impairments from held for sale assets | Adjustment
Operating costs and expenses
Impairment of oil and gas properties			$ (13,870)		$ (13,870)
Total operating expenses			(13,870)		(13,870)
Operating income (loss)			13,870		13,870
Other income (expense)
Other income (expense)			(2,333)		(2,333)
Other income (expense), net			(2,333)		(2,333)
Income (loss) before income tax			11,537		11,537
Income tax provision (benefit)			183		183
Net income (loss)			11,354		11,354
Net income (loss) attributable to non-controlling interests			4,331		4,331
Net income (loss) attributable to controlling interests			7,023		7,023
Net income (loss) attributable to common shareholders			$ 7,023		$ 7,023
Earnings (loss) per share:
Basic - Net income (loss) attributable to common shareholders (in dollars per share)	[1]		$ 0.11		$ 0.11
Diluted - Net income (loss) attributable to common shareholders (in dollars per share)	[1]		$ 0.11		$ 0.11

[1] All share and earnings per share information presented has been recast to retrospectively adjust for the effects of the 0.087423 per share Special Stock Dividend, as defined in Note 12, “Stockholders’ and Mezzanine equity”, distributed on March 31, 2017.