Assets Held for Sale and Discontinued Operations - Summary of Results of Operations for Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2019
Discontinued Operations And Disposal Groups [Abstract]
Revenues	$ 1,874	$ 5,402
Depreciation, depletion, amortization and accretion	(168)	(380)
Other operating expenses	(2,943)	(3,738)
Other income		2
Income (loss) from discontinued operations, net of tax	(1,237)	1,286
Income (loss) from discontinued operations, net of tax	$ (1,237)	$ 1,286

Disposal group including discontinued operation other operating benefit (expense).

No definition available.

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- Definition

Amount after tax of income (loss) from operations classified as a discontinued operation. Excludes gain (loss) on disposal and provision for gain (loss) until disposal.

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Amount of depreciation and amortization expense attributable to disposal group, including, but not limited to, discontinued operation.

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- Definition

Amount of other income attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.

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- Definition

Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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