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Property and Equipment, Net (Schedule of Assets Under Capital Leases) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Equipment and furniture	$ 17,032	$ 15,675
Less accumulated depreciation and amortization	(33,372)	(30,728)
Property, plant and equipment, net	6,611	7,037
Assets Held under Capital Leases [Member]
Property, Plant and Equipment [Line Items]
Equipment and furniture	392	420
Less accumulated depreciation and amortization	(257)	(172)
Property, plant and equipment, net	$ 135	$ 248

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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- 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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