Property And Equipment (Components Of Property And Equipment) (Details) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Property And Equipment [Abstract]
Land	$ 6,322,000		$ 6,322,000		$ 6,322,000
Facilities and equipment	238,361,000		238,361,000		153,695,000
Marine vessels	448,947,000		448,947,000		285,113,000
Construction in progress	315,090,000		315,090,000		531,765,000
Total property and equipment	1,008,720,000		1,008,720,000		976,895,000
Less: Accumulated depreciation	(183,183,000)		(183,183,000)		(192,176,000)
Property and equipment, net	825,537,000		825,537,000		784,719,000
Capitalized interest costs	$ 4,200,000	$ 4,500,000	$ 12,600,000	$ 13,400,000

Gross amount, at the balance sheet date, of long-lived, depreciable assets that include (i) building structures held for productive use including any addition, improvement, or renovation to the structure, such as interior masonry, interior flooring, electrical, and plumbing; (ii) assets used in the production process to produce goods and services; and (iii) assets commonly used in offices.

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- Definition

Marine Vessels Cost Related To Property And Equipment

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- Definition

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.

+ References

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-Name Accounting Standards Codification

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-Publisher AICPA

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- Definition

Gross amount, at the balance sheet date, of long-lived assets under construction that include construction costs to date on capital projects that have not been completed and assets being constructed that are not ready to be placed into service.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Number 12

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- Definition

The amount of interest that was capitalized during the period.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 34

-Paragraph 21

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Carrying amount as of the balance sheet date of real estate held for productive use. This excludes land held for sale.

+ References

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- Definition

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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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.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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