Goodwill and intangible assets disclosure.

No definition available.

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- Definition

Percentage fair value exceeds carrying value.

+ References

No definition available.

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

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- Definition

Amount of accumulated impairment loss for 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://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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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

The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill And Intangible Assets Disclosure [Line Items]
Goodwill impairment charge	$ 211,129,000
Impairment	0
Amortization expense on intangible assets	18,300,000	$ 24,300,000	$ 3,600,000
Contract Drilling
Goodwill And Intangible Assets Disclosure [Line Items]
Accumulated impairment losses	$ 0	0
Percentage fair value exceeds carrying values	16.00%
Goodwill impairment charge	$ 0
Other Operations
Goodwill And Intangible Assets Disclosure [Line Items]
Accumulated impairment losses	0	$ 0
Goodwill impairment charge	$ 0
Oilfield Rental
Goodwill And Intangible Assets Disclosure [Line Items]
Percentage fair value exceeds carrying values	14.00%
Goodwill impairment charge	$ 0
Pressure Pumping and Directional Drilling
Goodwill And Intangible Assets Disclosure [Line Items]
Goodwill impairment charge	$ 211,000,000