Inventories (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2012	Apr. 30, 2012	Jul. 31, 2011
Inventories [Abstract]
Finished Goods	$ 77,897	$ 86,954	$ 83,401
Work-in-Process	6,737	6,487	7,758
Paper, Cloth, and Other	9,446	8,072	10,342
Gross inventory	94,080	101,513	101,501
Inventory Value of Estimated Sales Returns	6,964	7,246	8,235
LIFO Reserve	(7,722)	(7,522)	(6,232)
Total Inventories	$ 93,322	$ 101,237	$ 103,504

Certain changes made in the current period to the value and amount of inventory reported.

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Carrying amount as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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Carrying amount as of the balance sheet date of merchandise or goods which are partially completed, are generally comprised of raw materials, labor and factory overhead costs, and which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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Carrying amount as of the balance sheet date of components used by the Entity which are bought from another entity rather than produced by the Entity.

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