No Definition Available.

No definition available.

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- Definition

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value also includes purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value.

+ References

No definition available.

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- Definition

Represents the growth rate used to calculate terminal values for each reporting unit using a Gordon Growth methodology.

+ References

No definition available.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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Summary of Significant Accounting Policies - Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Goodwill
Long-term growth rate used to calculate terminal values for each reporting unit (as a percent)			2.00%
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments
Goodwill - Beginning Balance	$ 28,380		$ 28,380
Acquisitions and purchase price adjustment
Disposals and Impairments	(27,800)	$ (93,600)	(27,798)	$ (93,634)
Cumulative Translation Adjustment			(582)
Goodwill - Ending Balance
Drilling Solutions
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments
Goodwill - Beginning Balance	11,436		11,436
Acquisitions and purchase price adjustment
Disposals and Impairments	(11,400)		(11,436)
Cumulative Translation Adjustment
Goodwill - Ending Balance
Rig Technologies
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments
Goodwill - Beginning Balance	16,944		16,944
Acquisitions and purchase price adjustment
Disposals and Impairments	$ (16,400)		(16,362)	$ (18,000)
Cumulative Translation Adjustment			(582)
Goodwill - Ending Balance