Note 3 - Supplemental Balance Sheet Information (Detail) - Property, Plant and Equipment (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment, Gross	$ 335,261	$ 315,115
Less – Accumulated depreciation	(166,316)	(150,629)
Total	168,945	164,486
Land and Land Improvements [Member]
Property, Plant and Equipment, Gross	12,725	12,791
Building and Building Improvements [Member]
Estimated Useful Lives (Years) - Start	5
Estimated Useful Lives (Years) - End	40
Property, Plant and Equipment, Gross	64,810	64,287
Machinery and Equipment [Member]
Estimated Useful Lives (Years) - Start	4
Estimated Useful Lives (Years) - End	10
Property, Plant and Equipment, Gross	176,997	164,679
Furniture and Fixtures [Member]
Estimated Useful Lives (Years) - Start	3
Estimated Useful Lives (Years) - End	10
Property, Plant and Equipment, Gross	16,611	15,673
Vehicles [Member]
Estimated Useful Lives (Years) - Start	3
Estimated Useful Lives (Years) - End	10
Property, Plant and Equipment, Gross	48,855	48,596
Construction in Progress [Member]
Property, Plant and Equipment, Gross	$ 15,263	$ 9,089

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, at the balance sheet date, of long-lived physical assets used in the normal conduct of business and not intended for resale. This can 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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- Definition

Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. 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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