Major Classes of Property, Plant and Equipment, at Cost (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Land, buildings and leasehold improvements	$ 201,155	$ 189,817
Machinery and equipment	313,325	285,771
Computer equipment and software	70,618	64,076
Construction in progress	41,424	26,390
Property, plant and equipment, gross	626,522	566,054
Less: Accumulated depreciation	(328,577)	(314,142)
Property, plant and equipment, net	$ 297,945	$ 251,912	$ 287,705

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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