No Definition Available.

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.

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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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- Definition

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

+ References

No definition available.

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Summary of Significant Accounting Policies - Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 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
Disposals and Impairments	(27,800)				(27,798)	$ (155,973)
Cumulative Translation Adjustment					(582)
Goodwill - Ending Balance		$ 28,380				28,380
US Segment
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments
Disposals and Impairments		(52,200)
International
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments
Disposals and Impairments			$ (75,600)
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
Disposals and Impairments					(11,436)
Goodwill - Ending Balance		11,436				11,436
Rig Services
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments
Goodwill - Beginning Balance	$ 16,944				16,944
Disposals and Impairments		(10,100)	$ (18,000)		(16,362)
Cumulative Translation Adjustment					$ (582)
Goodwill - Ending Balance		$ 16,944				$ 16,944