PROPERTY AND EQUIPMENT, Net (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Property and equipment, net
Property and equipment, gross	$ 69,928	$ 56,848
Less: accumulated depreciation and amortization	(28,997)	(22,297)
Property and equipment, net	40,931	34,551
Land
Property and equipment, net
Property and equipment, gross	3,076	3,076
Leasehold improvements
Property and equipment, net
Property and equipment, gross	2,015	1,998
Furniture and fixtures
Property and equipment, net
Property and equipment, gross	2,017	1,959
Office and computer equipment
Property and equipment, net
Property and equipment, gross	6,162	5,541
Computer software
Property and equipment, net
Property and equipment, gross	9,103	8,428
Equipment
Property and equipment, net
Property and equipment, gross	27,500	20,150
Vehicles
Property and equipment, net
Property and equipment, gross	$ 20,055	$ 15,696

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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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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