Property and Equipment (Tables)

6 Months Ended

Mar. 31, 2013

Property, Plant and Equipment [Abstract]

A Summary of Property and Equipment by Classification

A summary of property and equipment by classification is as follows:



(In thousands)	March 31, 2013			September 30, 2012
Drilling vessels and equipment	$	2,760,263		$	2,523,895
Construction work in progress	602,127			438,081
Drill pipe	22,193			20,576
Office equipment and other	23,625			19,610
Cost	3,408,208			3,002,162
Less: Accumulated depreciation	(519,973		)	(464,822		)
Drilling and other property and equipment, net	$	2,888,235		$	2,537,340

- 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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