Certain Relationships and Related Party Transactions (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands			4 Months Ended	8 Months Ended	12 Months Ended
		Oct. 24, 2016	Dec. 31, 2016	Aug. 31, 2016	Dec. 31, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Related Party Transaction [Line Items]
Accrued well drilling and completion costs			$ 4,933		$ 4,933
Asset retirement obligation			75,347	$ 58,868	75,347
Other income (loss)	[1]		22,413
Predecessor
Related Party Transaction [Line Items]
Accrued well drilling and completion costs								$ 26,914
Provision for losses on Drilling Partnership receivables				10,906
Asset retirement obligation				130,935				113,740	$ 107,950	$ 91,179
Other income (loss)	[1]			(9,189)
Relationship with ATLS
Related Party Transaction [Line Items]
Accounts receivable			3,300		3,300
Accounts payable								1,300
Relationship with Drilling Partnerships
Related Party Transaction [Line Items]
Accounts receivable			300		300			6,600
Accounts payable			5,600		5,600			3,000
Payments to acquire oil and gas properties		$ 31,000
Asset retirement obligation		$ 14,700
Other income (loss)			22,400
Business Acquisition, Effective Date of Acquisition		Oct. 01, 2016
Relationship with Drilling Partnerships | Predecessor
Related Party Transaction [Line Items]
Capital raised from investors							$ 36,700
Accrued well drilling and completion costs							$ 13,300
Cash transferred to partners						$ 5,200
Payments to acquire oil and gas properties				7,200
Asset retirement obligation				12,400
Other income (loss)				$ 6,100
Relationship with AGP
Related Party Transaction [Line Items]
Accounts receivable			$ 800		$ 800
Accounts payable								$ 8,700
Compensation as percentage of gross proceeds of private placement offering					3.00%
Percentage of gross offering proceeds reallowed					1.25%
Relationship with AGP | Class A Common Units
Related Party Transaction [Line Items]
Sales commissions as percentage of gross proceeds of private placement offering					7.00%
Relationship with AGP | Class T Common Units
Related Party Transaction [Line Items]
Sales commissions as percentage of gross proceeds of private placement offering					3.00%
Distribution and unitholder servicing fee as percentage of gross proceeds of private placement offering					4.00%
Rate of cash distributions to be withheld or payable to purchasers, per unit per quarter					$ 0.025
Relationship with AGP | Maximum
Related Party Transaction [Line Items]
Compensation as percentage of gross proceeds of private placement offering					12.00%
Limited partners units issued			100,000,000		100,000,000
Percentage of gross offering proceeds reallowed					1.50%

[1] Gain (loss) on asset sales and disposal, reorganization items, net, gain on early extinguishment of debt, interest expense and income tax (expense) benefit have not been allocated to reportable segments as it would be impracticable to reasonably do so for the periods presented.