Acquisitions - Unaudited Pro Forma Results of Operations (Detail) - Taylor Brands, LLC, Crimson Trace Corporation and Ultimate Survival Technologies, Inc. - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2017	Jan. 31, 2016
Business Acquisition [Line Items]
Net sales	$ 234,948	$ 232,021	$ 705,061	$ 570,298
Income from operations	$ 48,817	$ 49,050	$ 153,091	$ 91,138
Net income per share - diluted	$ 0.57	$ 0.58	$ 1.81	$ 1.10

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.

No definition available.

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- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463

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Amount after tax of pro forma income from continuing operations as if the business combination had been completed at the beginning of a period.

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- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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