Property, Plant and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,170,993	$ 1,258,618
Less: Accumulated depreciation	(612,878)	(635,643)
Property, plant and equipment, net	558,115	622,975
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	55,443	56,983
Building and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	253,960	184,615
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	802,414	922,159
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 59,176	$ 94,861

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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