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Segment Reporting - Schedule of Assets by Business Segment (Detail) - USD ($) $ in Thousands | Apr. 30, 2017 | Apr. 30, 2016 | Apr. 30, 2015
--- | --- | --- | ---
Segment Reporting Information [Line Items] |  |  |
Total assets | $ 788,036 | $ 619,503 |
Property, plant, and equipment, net | 149,685 | 135,405 |
Intangibles, net | 141,317 | 62,924 |
Goodwill | 169,017 | 76,357 | $ 75,426
Firearms Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 393,341 | 458,053 |
Property, plant, and equipment, net | 135,985 | 132,274 |
Intangibles, net | 2,792 | 2,903 |
Goodwill | 13,770 | 13,770 | 13,770
Outdoor Products & Accessories Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 394,695 | 161,450 |
Property, plant, and equipment, net | 13,700 | 3,131 |
Intangibles, net | 138,525 | 60,021 |
Goodwill | $ 155,247 | $ 62,587 | $ 61,656

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