Property, Plant And Equipment, Intangible Assets And Goodwill (Schedule Of Property, Plant And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 3,244,437	$ 3,156,962
Less: accumulated depreciation	1,029,998	910,252
Property, plant and equipment, net	2,214,439	2,246,710
Land, Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	206,266	204,543
Structures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	2,858,625	2,783,434
Furniture and Other Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	118,745	111,481
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Construction in progress	$ 60,801	$ 57,504

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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