Drilling and Other Property and Equipment (Tables)

6 Months Ended

Jun. 30, 2011

Drilling and Other Property and Equipment [Abstract]

Summary of Cost and accumulated depreciation of drilling and other property and equipment


	June 30,			December 31,
	2011			2010
	(In thousands)
Drilling rigs and equipment	$	7,235,894		$	7,163,196
Land and buildings		60,027			56,536
Office equipment and other		46,509			44,689

Cost		7,342,430			7,264,421
Less: accumulated depreciation		(3,182,888	)		(2,980,629	)

Drilling and other property and equipment, net	$	4,159,542		$	4,283,792

- Definition

Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. 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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