COMMITMENTS AND CONTINGENCIES (Schedule of Purchase Commitments) (Details) (Construction in Progress, Newbuild Drilling Units [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2013 DrillingUnit
Long-term Purchase Commitment [Line Items]
Number of drilling units	4
Capital Addition Purchase Commitments [Member]
Purchase Obligation, Fiscal Year Maturity [Abstract]
2014	$ 731,000
2015	369,000
2016	428,000
2017	0
2018 and thereafter	$ 0

Minimum amount of purchase arrangement maturing in the next fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

No definition available.

Name:	us-gaap_PurchaseObligationDueInNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant