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Inventories (Details) - USD ($) $ in Thousands | Jan. 28, 2017 | Apr. 30, 2016
--- | --- | ---
Inventories |  |
Raw materials | $ 92,881 | $ 87,905
Work in process | 11,767 | 11,591
Finished goods | 110,815 | 97,861
FIFO inventories | 215,463 | 197,357
Excess of FIFO over LIFO | (21,768) | (21,768)
Inventories, net | $ 193,695 | $ 175,589

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