Commitments and Contingencies (Details 3) (USD $) In Millions, unless otherwise specified	1 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended		9 Months Ended
	Mar. 31, 2011 Court of Ouargla Customs Infringement	Sep. 30, 2013 Court of Ouargla Customs Infringement	Dec. 31, 2009 Court of Ouargla Customs Infringement	Sep. 30, 2013 Court of Ouargla Customs Infringement Maximum	Dec. 31, 2006 Court of Ouargla Foreign Currency Controls	Sep. 30, 2013 Court of Ouargla Foreign Currency Controls Maximum	Mar. 19, 2012 NGH2L	Sep. 30, 2013 NGH2L Maximum
Commitments and Contingencies, Disclosure
Judgment against the reporting entity at current exchange rate	$ 34.8		$ 17.7
Payment of contract amount in foreign currency					7.5
Payment of contract amount in domestic currency					3.2
Approximate multiplier of the amount at issue for fines and penalties		4
Amount paid to customs authority		3.1
Posted security paid		1.33
Potential judgment in excess of accrual				13.3		26.8
Monetary damages sought based on alleged breach of contract by NGH2L and alleged tortious interference with contractual relations by Parex								100
Escrow Deposit Retained							$ 3