Impairment of Assets - Summary of Property, Plant and Equipment Not in Use (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Jun. 30, 2012
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	$ 63,749	$ 63,856
Less accumulated depreciation	33,272	33,774
Property, plant and equipment - net	30,477	30,082
Temporarily Idle Assets [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	3,086
Less accumulated depreciation	1,522
Property, plant and equipment - net	$ 1,564

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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