Quarterly Results (Unaudited) - Schedule of Quarterly Financial Information (Details) - USD ($)
$ / shares in Units, $ in Thousands

3 Months Ended

12 Months Ended

Jul. 27, 2016

Dec. 31, 2017

Sep. 30, 2017

Jun. 30, 2017

Mar. 31, 2017

Dec. 31, 2016

Sep. 30, 2016

Jun. 30, 2016

Mar. 31, 2016

Dec. 31, 2017

Dec. 31, 2016

Dec. 31, 2015

Schedule Of Quarterly Financial Information [Line Items]

Revenues

$ 1,229

$ 1,298

$ 2,649

$ 3,875

$ 1,872

^[1]

$ 42,237

^[1],[2]

$ (13,804)

^[1]

$ 106,853

^[1]

$ 9,051

$ 137,158

$ 753,493

Net income (loss)

(944)

(7,341)

(3,425)

(4,903)

(51,537)

^[2],[3]

13,568

^[2],[3]

(150,717)

^[2],[3]

(1,611)

^[2],[3]

Loss attributable to non-controlling interests

1,146

1,022

343

281

43,938

23,619

^[2]

114,637

(5,340)

2,792

176,854

649,316

Net income (loss) attributable to unitholders’/owner’s interests

$ 202

$ (6,319)

$ (3,082)

$ (4,622)

$ (7,599)

$ 37,187

^[2]

$ (36,080)

$ (6,951)

Basic

$ (0.03)

^[1]

$ (0.20)

^[1]

$ (0.10)

^[1]

$ (0.18)

^[1]

$ (0.29)

^[4]

$ 1.41

^[2],[4]

$ (1.39)

^[4]

$ (0.27)

^[4]

Diluted

$ (0.03)

^[1]

$ (0.20)

^[1]

$ (0.10)

^[1]

$ (0.18)

^[1]

$ (0.29)

^[4]

$ 1.00

^[2],[4]

$ (1.39)

^[4]

$ (0.27)

^[4]

Antidilutive Securities Excluded From Computation Of Diluted Earnings Attributable To Common Limited Partners Outstanding Units

2,896,000

2,917,000

3,143,000

3,521,000

9,709,000

7,956,000

7,781,000

Gains (losses) on mark to market derivatives

$ (310)

18,601

(268,085)

Gain on deconsolidation

46,951

Asset impairment

$ 41,900

41,879

$ 973,981

Atlas Resource Partners, L.P.

Schedule Of Quarterly Financial Information [Line Items]

Gains (losses) on mark to market derivatives

$ 73,300

Gain on deconsolidation

$ 46,400

$ 46,900

$ 46,951

[1]	For the fourth quarter, third quarter, second quarter and first quarter of the year ended December 31, 2017, approximately 2,896,000, 2,917,000 3,143,000 and 3,521,000 units, respectively, were excluded from the computation of diluted net income (loss) per common unit, because the inclusion of such units would have been anti-dilutive.
[2]	For the fourth quarter, second quarter and first quarter of the year ended December 31, 2016, approximately 9,709,000, 7,956,000 and 7,781,000 units, respectively, were excluded from the computation of diluted net income (loss) per common unit, because the inclusion of such units would have been anti-dilutive.
[3]	ARP was deconsolidated in the third quarter of 2016, resulting in the recognition of a $46.9 million gain in that quarter.
[4]	Revenues include gains (losses) on mark to market derivatives. A $73.3 million loss on ARP’s mark-to-market derivatives is included for the second quarter related to increases in commodity future prices relative to ARP’s commodity fixed price swaps during the second quarter as compared to the prior year period.

Atlas Energy Group, LLC 10-K