Goodwill, Impairment Loss, Percentage Of Gross Carrying Amount

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 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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- 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.

+ References

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- Definition

Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended		12 Months Ended
	Apr. 30, 2020	Jul. 31, 2021	Jul. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Segment Reporting Information [Line Items]
Impairment expense, percentage of gross carrying amount of goodwill				100.00%
Aggregate amortization expense		$ 618,000,000	$ 794,000,000	$ 1,800,000	$ 1,800,000
Seamap
Segment Reporting Information [Line Items]
Goodwill, impairment	$ 2,500,000
Klein Associates Inc.
Segment Reporting Information [Line Items]
Impairment of intangible assets				0
Impairment of indefinite lived intangible assets				$ 760,000