Property and Equipment (Tables)

3 Months Ended

Dec. 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)	December 31, 2013			September 30, 2013
Drilling vessels and equipment	$	3,632,897		$	2,979,503
Construction work in progress	501,486			715,320
Drill pipe	32,804			26,743
Office equipment and other	29,672			24,439
Cost	4,196,859			3,746,005
Less: Accumulated depreciation	(613,592		)	(581,281		)
Drilling and other property and equipment, net	$	3,583,267		$	3,164,724