Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2012

Major Components of Property, Plant and Equipment

	December 31,
	2012			2011
	(In thousands)
Land	$	49,965		$	22,120
Buildings	154,878			132,753
Drilling, workover and well-servicing rigs, and related equipment	12,364,021			11,150,927
Marine transportation and supply vessels	14,054			14,023
Oilfield hauling and mobile equipment	1,313,339			1,171,930
Other machinery and equipment	176,468			248,938
Oil and gas properties	—			42,033
Construction-in-process (1)	363,537			815,987
	$	14,436,262		$	13,598,711
Less: accumulated depreciation and amortization	(5,724,174		)	(4,928,781		)
Less: accumulated depletion	—			(39,984		)
	$	8,712,088		$	8,627,897

(1) Relates primarily to amounts capitalized for new or substantially new drilling, workover and well-servicing rigs that were under construction and had not yet been placed in service as of December 31, 2012 or 2011.

- 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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