No Definition Available.

No definition available.

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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.

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No definition available.

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Represents goodwill for the consolidated company, expected to be deductible for tax purposes.

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No definition available.

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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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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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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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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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Amount of increase (decrease), classified as other, of an asset representing the future economic benefits 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.

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Amount of divestiture 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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Summary of Significant Accounting Policies - Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments
Goodwill - Beginning Balance			$ 183,914	$ 173,226
Acquisitions and purchase price adjustment				11,436
Disposals and Impairments			(155,973)
Cumulative Translation Adjustment			439	(748)
Goodwill - Ending Balance	$ 28,380		$ 28,380	183,914
Goodwill
Long-term growth rate used to calculate terminal values for each reporting unit (as a percent)			2.00%
Goodwill impairments			$ 155,973
Discontinued Operation, additional disclosures
Goodwill for the consolidated company, expected to be deductible for tax purposes	8,200		8,200
U.S. Drilling
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments
Goodwill - Beginning Balance			50,149	50,149
Disposals and Impairments			(52,203)
Other Adjustment			2,054
Goodwill - Ending Balance				50,149
Goodwill
Goodwill impairments	52,200
International Drilling
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments
Goodwill - Beginning Balance			75,634	75,634
Disposals and Impairments			(75,634)
Goodwill - Ending Balance				75,634
Goodwill
Goodwill 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
Acquisitions and purchase price adjustment				11,436
Goodwill - Ending Balance	11,436		11,436	11,436
Rig Technologies
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments
Goodwill - Beginning Balance			46,695	47,443
Disposals and Impairments			(28,136)
Cumulative Translation Adjustment			439	(748)
Other Adjustment			(2,054)
Goodwill - Ending Balance	16,944		$ 16,944	$ 46,695
Goodwill
Goodwill impairments	$ 10,100	$ 18,000