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Note 11 - Business Segments and Significant Customers (Detail) - Long-Lived Assets By Geographic Area (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Long-lived assets	$ 996,659	$ 923,212
United States [Member]
Long-lived assets	996,405	923,040
Canada [Member]
Long-lived assets	198	99
Mexico [Member]
Long-lived assets	$ 56	$ 73

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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