PROPERTY AND EQUIPMENT (Tables)

6 Months Ended

Mar. 31, 2017

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)	March 31, 2017			September 30, 2016
Drilling vessels and equipment	$	3,741,648		$	3,898,686
Construction work in progress	1,011,063			857,572
Drill pipe	51,328			52,543
Office equipment and other	39,173			39,213
Total cost	4,843,212			4,848,014
Less: Accumulated depreciation	(699,822		)	(720,318		)
Property and equipment, net	$	4,143,390		$	4,127,696