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Goodwill by Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2020	Jun. 30, 2020
Goodwill [Line Items]
Impairment		$ (395,060)
Contract Drilling
Goodwill [Line Items]
Balance at beginning of period	$ 395,060	395,060
Impairment	$ (395,000)	$ (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

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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.

+ References

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