Number of drilling rigs removed from service

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- Definition

Number of rigs sold

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No definition available.

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Amount of assets held-for-sale that are not part of a disposal group.

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Amount classified as property, plant and equipment attributable to disposal group held for sale or disposed of, expected to be disposed of after one year or the normal operating cycle, if longer.

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- Definition

Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

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The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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Divestitures (Narrative) (Details) $ in Thousands	3 Months Ended			9 Months Ended
Divestitures (Narrative) (Details) $ in Thousands	Sep. 30, 2019 USD ($)	Dec. 31, 2018 USD ($) rig	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) rig	Sep. 30, 2018 USD ($)
Segment Reporting Information [Line Items]
Impairments	$ 234,880		$ 0	$ 234,880	$ 0
Gain (loss) on Disposition of Assets	(231)		253	(1,424)	575
Assets held for sale	17,299	$ 22,511		17,299
Oil and Natural Gas [Member]
Segment Reporting Information [Line Items]
Proceeds from non-core oil and natural gas asset sales, net of related expenses				2,200	22,300
Impairments	169,806			169,806
Gain (loss) on Disposition of Assets	28		7	166	136
Drilling [Member]
Segment Reporting Information [Line Items]
Number of drilling rigs removed from service \| rig		41
Impairments	62,809	$ 147,900		62,809
Gain (loss) on Disposition of Assets	(288)		$ 230	$ (1,737)	$ 314
Assets Held for Sale Drilling Equipment [Member]
Segment Reporting Information [Line Items]
Number of rigs sold \| rig				4
Net book value of assets held for sale that were sold	$ 5,200			$ 5,200
Gain (loss) on Disposition of Assets				$ 500