Divestitures, Assets Held for Sale, and Acquisitions (Tables)

6 Months Ended

Jun. 30, 2018

Divestitures, Assets Held for Sale, and Acquisitions [Abstract]

Disposal Groups, Including Discontinued Operations [Table Text Block]

The following table presents loss before income taxes from the Divide County, North Dakota assets sold for the three and six months ended June 30, 2018, and 2017. The Divide County Divestiture was considered a disposal of a significant asset group.

	For the Three Months Ended June 30,						For the Six Months Ended June 30,
	2018			2017			2018			2017
	(in thousands)
Loss before income taxes (1)	$	(17,478	)	$	(153,442	)	$	(28,975	)	$	(486,161	)

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⁽¹⁾  Loss before income taxes reflects oil, gas, and NGL production revenue, less oil, gas, and NGL production expense, depletion, depreciation, amortization, and asset retirement obligation liability accretion expense, impairment expense, and net loss on divestiture activity.