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Net Sales - Breakdown of Export Net Sales (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2017 | Jan. 31, 2017 | Oct. 31, 2016 | Jul. 31, 2016 | Apr. 30, 2016 | Jan. 31, 2016 | Oct. 31, 2015 | Jul. 31, 2015 | Apr. 30, 2017 | Apr. 30, 2016 | Apr. 30, 2015
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 229,186 | $ 233,523 | $ 233,528 | $ 206,951 | $ 221,117 | $ 210,786 | $ 143,242 | $ 147,763 | $ 903,188 | [1] | $ 722,908 | [1] | $ 551,862 | [1]
Europe |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 11,545 |  | 8,913 |  | 8,164 |
Asia |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 4,046 |  | 3,989 |  | 1,463 |
Latin America |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 1,778 |  | 2,593 |  | 1,643 |
All others international |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 10,418 |  | 9,120 |  | 11,570 |
Total International |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 27,787 |  | $ 24,615 |  | $ 22,840 |
[1] | For the years ended April 30, 2017 and 2016, we allocated all of corporate overhead expenses except for interest and income taxes, such as general and administrative expenses and other corporate-level expenses, to both our Firearms and Outdoor Products & Accessories segments. For the year ended April 30, 2015, segment information herein has been restated from that previously presented to allocate corporate overhead expenses on the same basis. Corporate overhead expenses were not previously allocated for the year ended April 30, 2015 due to the timing of the BTI Acquisition.

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