Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

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Commitments and Contingencies (Details) (Royalty Agreements [Member], USD $)
In Millions, unless otherwise specified
1 Months Ended
Mar. 31, 2012
Oil and Gas Delivery Commitments and Contracts [Line Items]  
Cheniere's purchase of rights, title and interest in Crest Royalty $ 27.5
Maximum [Member]
 
Oil and Gas Delivery Commitments and Contracts [Line Items]  
Oil and Gas Delivery Commitments and Contracts, Royalty Guarantees, Amount 11.0
Minimum [Member]
 
Oil and Gas Delivery Commitments and Contracts [Line Items]  
Oil and Gas Delivery Commitments and Contracts, Royalty Guarantees, Amount $ 2.0