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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Section 45
-Paragraph 28
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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
-Name Accounting Standards Codification
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-SubTopic 20
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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

Amount of increase (decrease) 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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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Line Items]
Increase in goodwill			$ 2,104,000
Percentage fair value exceeds carrying value			13.00%
Goodwill impairment charge	$ 17,800,000		$ 17,800,000
Amortization expense on intangible assets	5,300,000	$ 4,200,000	12,600,000	$ 14,500,000
Contract Drilling
Goodwill And Intangible Assets Disclosure [Line Items]
Accumulated impairment losses	0		0		$ 0
Other Operations
Goodwill And Intangible Assets Disclosure [Line Items]
Increase in goodwill			2,104,000
Accumulated impairment losses	17,800,000		17,800,000		$ 0
Goodwill impairment charge			$ 17,800,000
Oilfield Rentals and Electrical Controls and Automation Reporting Unit
Goodwill And Intangible Assets Disclosure [Line Items]
Goodwill impairment charge	$ 17,800,000