Commitments and Contingencies-Contractual Revenue (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2012
Unbilled Receivables, Not Billable at Balance Sheet Date [Abstract]
June 30, 2013	$ 1,019,670
June 30, 2014	737,057
June 30, 2015	670,175
June 30, 2016	$ 124,963

The future minimum contractual charter revenue within four years but more than three years from the balance sheet date, based on rigs committed to non cancellable, long term contracts. The amount does not include any assumed off-hire

No definition available.

Name:	orig_FutureMinimumContractualCharterRevenueYearFour
Namespace Prefix:	orig_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration