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Goodwill by Operating Segment (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Goodwill [Line Items]
Impairment	$ (395,060)
Contract Drilling
Goodwill [Line Items]
Balance at beginning of period	395,060
Impairment	$ (395,060)

X

- 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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

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X

- 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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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+ References

No definition available.

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