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Goodwill - Schedule of Changes in Carrying Amount of Goodwill (Detail) $ in Thousands	3 Months Ended
	Jul. 31, 2018 USD ($)
Goodwill [Line Items]
Beginning Balance	$ 191,287
Adjustments	(84)
Ending Balance	191,203
Firearms Segment
Goodwill [Line Items]
Beginning Balance	18,490
Adjustments	(84)
Ending Balance	18,406
Outdoor Products & Accessories Segment
Goodwill [Line Items]
Beginning Balance	172,797
Ending Balance	$ 172,797

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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
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X

- 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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X

- Definition

Amount of increase (decrease) from adjustments after acquisition date under purchase accounting 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e961-128460

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