Property and Equipment (Details) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Property and Equipment
Property and equipment, at cost	$ 2,667,682,000	$ 2,468,289,000
Less: accumulated depreciation	(433,178,000)	(396,686,000)
Property and equipment, net	2,234,504,000	2,071,603,000
Other accrued liabilities	1,900,000	2,000,000
Land [Member]
Property and Equipment
Property and equipment, at cost	321,892,000	241,145,000
Land improvements [Member]
Property and Equipment
Property and equipment, at cost	7,994,000	7,994,000
Buildings [Member]
Property and Equipment
Property and equipment, at cost	2,001,762,000	1,903,782,000
Furniture, fixtures, and equipment [Member]
Property and Equipment
Property and equipment, at cost	333,305,000	309,976,000
CIP and corporate office equipment [Member]
Property and Equipment
Property and equipment, at cost	$ 2,729,000	$ 5,392,000

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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