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Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2012

(dollars in thousands)	Estimated Useful Life in Years	2012			2011

Land	—	$	3,990		$	3,990
Buildings and improvements	3 to 39		13,096			12,392
Construction equipment	2 to 12		195,085			161,712
Office equipment	3 to 7		4,782			3,429

			216,953			181,523
Less: Accumulated depreciation and amortization			(88,042	)		(64,345	)

		$	128,911		$	117,178

- Definition

Tabular disclosure of the useful life and salvage value of 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.

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