Property, Plant and Equipment, Net (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013	Apr. 30, 2012
Property, Plant and Equipment, Gross	$ 53,807	$ 52,460
Less accumulated depreciation	(27,986)	(26,536)
Property, plant and equipment, net	25,821	25,924
Land, Buildings and Improvements [Member]
Property, Plant and Equipment, Gross	29,298	29,624
Furniture and Fixtures [Member]
Property, Plant and Equipment, Gross	$ 24,509	$ 22,836

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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