Operating Segment Information (Operating Segment Data) (Details) - USD ($)		1 Months Ended	2 Months Ended	3 Months Ended							4 Months Ended	8 Months Ended	12 Months Ended
		Sep. 30, 2016	Aug. 31, 2016	Dec. 31, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Aug. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Revenues		$ 20,435,000		$ 31,753,000			$ 142,424,000	$ 257,895,000	$ 96,125,000	$ 243,589,000	$ 52,188,000
Depreciation, depletion and amortization expense											(23,877,000)
Asset impairment											0
Segment income (loss)											(18,214,000)
Predecessor
Segment Reporting Information [Line Items]
Revenues			$ 64,686,000		$ (16,824,000)	$ 103,208,000						$ 151,070,000	$ 740,033,000	$ 701,654,000
Depreciation, depletion and amortization expense												(82,331,000)	(157,978,000)	(239,923,000)
Asset impairment												0	(966,635,000)	(573,774,000)
Segment income (loss)												(55,961,000)	(639,534,000)	(470,726,000)
Gas And Oil Production
Segment Reporting Information [Line Items]
Revenues	[1]										43,044,000
Operating costs and expenses											(39,418,000)
Depreciation, depletion and amortization expense											(23,218,000)
Segment income (loss)											(19,592,000)
Gas And Oil Production | Predecessor
Segment Reporting Information [Line Items]
Revenues	[1]											115,178,000	624,222,000	472,870,000
Operating costs and expenses												(86,566,000)	(169,653,000)	(182,226,000)
Depreciation, depletion and amortization expense												(68,647,000)	(145,161,000)	(229,482,000)
Asset impairment													(966,635,000)	(573,774,000)
Segment income (loss)												(40,035,000)	(657,227,000)	(512,612,000)
Well Construction And Completion
Segment Reporting Information [Line Items]
Revenues											2,326,000
Operating costs and expenses											(2,023,000)
Segment income (loss)											303,000
Well Construction And Completion | Predecessor
Segment Reporting Information [Line Items]
Revenues												19,157,000	76,505,000	173,564,000
Operating costs and expenses												(16,658,000)	(66,526,000)	(150,925,000)
Segment income (loss)												2,499,000	9,979,000	22,639,000
Other Partnership Management
Segment Reporting Information [Line Items]
Revenues	[2]										6,818,000
Operating costs and expenses	[2],[3]										(5,084,000)
Depreciation, depletion and amortization expense	[2]										(659,000)
Segment income (loss)	[2]										$ 1,075,000
Other Partnership Management | Predecessor
Segment Reporting Information [Line Items]
Revenues	[2]											16,735,000	39,306,000	55,220,000
Operating costs and expenses	[2],[3]											(21,476,000)	(18,775,000)	(25,532,000)
Depreciation, depletion and amortization expense	[2]											(13,684,000)	(12,817,000)	(10,441,000)
Segment income (loss)	[2]											$ (18,425,000)	$ 7,714,000	$ 19,247,000

[1] Includes gain (loss) on mark-to-market derivatives.

[2] Includes revenues and expenses from well services, gathering and processing, administration and oversight, and other, net that do not meet the quantitative threshold for reporting segment information.

[3] General and administrative expenses have not been allocated to reportable segments as it would be impracticable to reasonably do so for the periods presented, except for $10.9 million in provision for losses on Drilling Partnership receivables for the period January 1, 2016 through August 31, 2016 related a provision for losses related to certain receivables from the Drilling Partnerships to their estimated net realizable values.