Property, Equipment And Leasehold Improvements, Net (Summary Of Property, Equipment And Leasehold Improvements, Net) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011 years	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 1,423,062	$ 899,157
Accumulated depreciation and amortization	(369,373)	(311,786)
Property, equipment and leasehold improvements, net	1,053,689	587,371
Land, Buildings And Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	604,786	384,941
Depreciable Lives, minimum (in years)	3
Depreciable Lives, maximum (in years)	45
Beef Processing Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	201,934
Depreciable Lives, minimum (in years)	2
Depreciable Lives, maximum (in years)	15
Oil And Gas Drilling Services Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	201,550	190,951
Depreciable Lives, minimum (in years)	7
Depreciable Lives, maximum (in years)	15
Other Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	202,832	190,476
Depreciable Lives, minimum (in years)	2
Depreciable Lives, maximum (in years)	25
Corporate Aircraft [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	111,279	99,437
Depreciable Lives, minimum (in years)	5
Depreciable Lives, maximum (in years)	10
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	23,347	21,406
Depreciable Lives, minimum (in years)	2
Depreciable Lives, maximum (in years)	10
Construction In Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	56,465	2,092
Other PP&E [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 20,869	$ 9,854
Depreciable Lives, minimum (in years)	3
Depreciable Lives, maximum (in years)	7

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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