Property and Equipment (Tables)

3 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

Summary of Property and Equipment by Classification

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

(In thousands)	December 31, 2014			September 30, 2014
Drilling vessels and equipment	$	4,021,901		$	4,181,774
Construction work in progress	437,939			319,548
Drill pipe	40,141			31,265
Office equipment and other	35,842			35,566
Total cost	4,535,823			4,568,153
Less: Accumulated depreciation	(522,650		)	(601,125		)
Property and equipment, net	$	4,013,173		$	3,967,028