Property And Equipment, Net (Details) (USD $)	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Property And Equipment, Net [Abstract]
Manufacturing and engineering equipment	$ 404,750,000	$ 419,116,000
Land, buildings and leasehold improvements	261,946,000	259,308,000
Office furniture, fixtures and equipment	106,467,000	110,228,000
Property and equipment, gross	773,163,000	788,652,000
Less accumulated depreciation	(564,399,000)	(570,083,000)
Property and equipment, net	208,764,000	218,569,000	239,111,000
Depreciation expense	$ 32,300,000	$ 36,400,000	$ 42,200,000

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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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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- Definition

Gross amount, at the balance sheet date, of long-lived physical assets used in the normal conduct of business and not intended for resale. This can include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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- Definition

Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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