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Domestic and Foreign Long-Lived Assets (Property, Plant and Equipment, Net) (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net (Note 1)	$ 113,602	$ 125,832
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net (Note 1)	105,800	118,100
Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net (Note 1)	$ 7,800	$ 7,700

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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