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Domestic and Foreign Long-Lived Assets (Property, Plant and Equipment, Net) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net (Note 1)	$ 138,070	$ 148,905
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net (Note 1)	130,300	140,700
Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net (Note 1)	$ 7,800	$ 8,200

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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