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Inventories (Details) - USD ($) $ in Thousands	Apr. 29, 2017	Apr. 30, 2016
Inventories
Raw materials	$ 83,371	$ 87,905
Work in process	11,320	11,591
Finished goods	101,444	97,861
FIFO inventories	196,135	197,357
Excess of FIFO over LIFO	(21,021)	(21,768)
Total inventories	$ 175,114	$ 175,589

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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-Publisher FASB
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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount by which inventory stated at last-in first-out (LIFO) is less than (in excess of) inventory stated at other inventory cost methods.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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