Note 4 - Property and Equipment (Detail) - Property and equipment are summarized as follows (in thousands): (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Property, Plant, and Equipment	$ 165,391	$ 154,761
Less accumulated depreciation	(63,065)	(71,332)
	102,326	83,429
Construction Equipment [Member]
Property, Plant, and Equipment	133,302	125,222
Transportation Equipment [Member]
Property, Plant, and Equipment	16,519	17,963
Building [Member]
Property, Plant, and Equipment	7,186	4,729
Office Equipment [Member]
Property, Plant, and Equipment	1,365	1,077
Construction in Progress [Member]
Property, Plant, and Equipment	1,933	2,544
Land [Member]
Property, Plant, and Equipment	4,886	3,026
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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