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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Note 1 - Basis of Presentation (Detail) - Property and equipment (USD $) In Thousands, unless otherwise specified					3 Months Ended				3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Land [Member]	Dec. 31, 2012 Land [Member]	Mar. 31, 2013 Building and Building Improvements [Member] Minimum [Member]	Mar. 31, 2013 Building and Building Improvements [Member] Maximum [Member]	Mar. 31, 2013 Building and Building Improvements [Member]	Dec. 31, 2012 Building and Building Improvements [Member]	Mar. 31, 2013 Equipment [Member] Minimum [Member]	Mar. 31, 2013 Equipment [Member] Maximum [Member]	Mar. 31, 2013 Equipment [Member]	Dec. 31, 2012 Equipment [Member]
Property and equipment:
Gross value	$ 399,147	$ 393,853	$ 24,399	$ 24,383			$ 56,024	$ 55,709			$ 318,724	$ 313,761
Estimated useful lives					7	40			3	20
Accumulated depreciation	(264,040)	(258,715)
Total property and equipment, net	$ 135,107	$ 135,138