6. PROPERTY AND EQUIPMENT (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property And Equipment Details
Medical equipment	$ 31,804	$ 31,514
Office equipment, furniture and fixtures	2,949	3,051
Leasehold improvements	14,253	13,567
Equipment under capital leases	1,982	1,982
Property and equipment, gross	50,988	50,114
Accumulated depreciation and amortization	(31,630)	(28,040)
Property and equipment, net	$ 19,358	$ 22,074

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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Property, plant, or equipment held under lease agreements classified as an asset.

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- Definition

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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