SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Estimated Useful Lives of Assets) (Details)	12 Months Ended
Sep. 30, 2012 Y
Drilling vessels equipment [Member]
Estimated useful lives of asset, Minimum	5
Estimated useful lives of asset, Maximum	35
Furniture and other [Member]
Estimated useful lives of asset, Minimum	3
Estimated useful lives of asset, Maximum	10

The maximum useful life of long-lived, physical assets used in the normal conduct of business 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.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLifeMaximum
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration