Note 4 - Property and Equipment (Detail) - Property and equipment are summarized as follows (amounts in thousands): (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Property, Plant, and Equipment	$ 168,839	$ 165,851
Less accumulated depreciation	(66,937)	(63,543)
	101,902	102,308
Construction Equipment [Member]
Property, Plant, and Equipment	132,363	130,014
Transportation Equipment [Member]
Property, Plant, and Equipment	19,550	19,266
Building [Member]
Property, Plant, and Equipment	10,427	10,176
Office Equipment [Member]
Property, Plant, and Equipment	1,383	1,279
Land [Member]
Property, Plant, and Equipment	4,916	4,916
Water Rights [Member]
Property, Plant, and Equipment	$ 200	$ 200

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 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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