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Inventories - Summary of Inventories (Parenthetical) (Detail) - USD ($)
$ in Thousands
Apr. 30, 2017
Apr. 30, 2016
Inventory [Line Items]    
Finished goods [1] $ 61,080 $ 26,574
Taylor Brands, LLC, Crimson Trace Corporation and Ultimate Survival Technologies, Inc.    
Inventory [Line Items]    
Finished goods $ 22,500  
[1] The large increase in finished goods inventory was primarily due to the 2017 Acquisitions, which amounted to $22.5 million. The large increase in finished parts was primarily due to our Firearms segment inventory.