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Property and Equipment

12 Months Ended

Dec. 31, 2011

4. Property and Equipment

The amount of property and equipment and their respective estimated useful lives are as follows (in thousands, except estimated useful lives):

	As of December 31,

	As of December 31,		Estimated Useful Lives
	2011	2010	Estimated Useful Lives

Land	$5,008	$5,231	Indefinite
Leasehold improvements	14,640	10,914	5 - 10 years
Office equipment, furniture and fixtures	6,467	6,151	3 - 7 years
Computer equipment and software costs	67,498	63,441	3 - 9 years
Machinery, equipment and vehicles	48,318	18,593	3 - 45 years

	141,931	104,330
Accumulated depreciation and amortization	51,221	40,224

	$90,710	$64,106

For 2011, 2010 and 2009, we recorded depreciation expense of $15.5 million, $9.3 million and $8.6 million, respectively. As of December 31, 2011 and 2010, computer software costs, including capitalized internally developed software costs, amounted to $30.1 million and $28.4 million, net of accumulated amortization of $20.5 million and $16.2 million, respectively. Included in capitalized computer software costs are costs incurred in connection with software development in progress of $7.7 million and $9.4 million as of December 31, 2011 and 2010, respectively. For 2011, 2010 and 2009, we recorded amortization expense related to computer software costs of $6.1 million, $4.2 million and $4.0 million, respectively. As of December 31, 2011 the cost and accumulated amortization of assets recorded under capital leases were $4.2 million and $0.7 million, respectively. As of December 31, 2010 the cost and accumulated amortization of assets recorded under capital leases were not significant.

- Definition

The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. 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. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, assets held for sale and public utility disclosures.

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