Note 11. Business Segments and Significant Customers (Detail) - Long-Lived Assets By Geographic Area (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Long-lived assets	$ 923,212	$ 833,288
United States [Member]
Long-lived assets	923,040	833,186
Canada [Member]
Long-lived assets	99	10
Mexico [Member]
Long-lived assets	$ 73	$ 92

- 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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