Commitments and Contingencies (Details) (USD $)	1 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013
Offshore drilling rig contract commitments
Drilling rig contract period	3 years
Initial rig rate per day	$ 600,000
Optional extension period	3 years
Estimated future minimum commitments under drilling rig contract
2014	90,440,000	90,440,000
2015	217,175,000	217,175,000
2016	217,770,000	217,770,000
2017	126,140,000	126,140,000
Total	651,525,000	651,525,000
Rig rate per day		$ 595,000