Property and Equipment

12 Months Ended

Dec. 31, 2012

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
	2012		2011		Estimated Useful Lives

Land	$	4,653	$	5,008	Indefinite
Buildings and leasehold improvements		21,081		14,640	3 - 15 years
Office equipment, furniture and fixtures		8,415		6,467	3 - 7 years
Computer equipment and software costs		80,233		67,498	3 - 9 years
Machinery, equipment and vehicles		66,122		48,318	3 - 30 years

		180,504		141,931
Accumulated depreciation and amortization		67,979		51,221

	$	112,525	$	90,710

For 2012, 2011 and 2010, we recorded depreciation expense of $18.6 million, $15.5 million and $9.3 million, respectively.

The amount of computer software costs, including capitalized internally developed software costs are as follows (in thousands):

As of December 31,

	2012		2011

Computer software costs	$	60,465	$	50,592
Accumulated amortization		27,710		20,481

Computer software costs, net	$	32,755	$	30,111

Included in capitalized computer software costs are costs incurred in connection with software development in progress of $3.0 million and $7.7 million as of December 31, 2012 and 2011, respectively. For 2012, 2011 and 2010, we recorded amortization expense related to computer software costs of $7.2 million, $6.1 million and $4.2 million, respectively.

The assets and accumulated amortization recorded under capital leases are as follows (in thousands):

As of December 31,

	2012		2011

Capital leases	$	4,489	$	4,236
Accumulated amortization		816		713

Capital leases, net	$	3,673	$	3,523

- 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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