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Risks and Other Important Factors	6 Months Ended
Risks and Other Important Factors	Jun. 30, 2015
Risks and Uncertainties [Abstract]
Risks and Other Important Factors	Risks and Other Important Factors — See “Item 1A. Risk Factors” of Part II of this Quarterly Report on Form 10-Q (“Quarterly Report”) and "Item 1A. Risk Factors" of Part I of the 2014 Annual Report, which describes key risks associated with our operations and industry.