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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Description of the Business, Subsequent Event – Going Concern and Management’s Plan, Cash Equivalents, Debt Issue Costs and Inventory) (Details) (USD $)
12 Months Ended
Dec. 31, 2013
foreign_country
Dec. 31, 2012
Sep. 30, 2011
Jun. 01, 2011
Sep. 30, 2014
Subsequent Event
Debt          
Credit Facility   $ 65,000,000     $ 13,000,000
Debt, Principal 800,001,000 1,865,012,000     800,000,000
Organization and Spin-off of Subsidiary          
Exploratory and development interests in foreign countries 2        
Percentage of subsidiary common stock sold in initial public offering (as a percent)       18.00%  
Percentage of subsidiary stock distributed to shareholders in spin-off (as a percent)     82.00%    
Highly liquid investments maturity (in months) 3 months        
Remaining unamortized debt issue costs 13,400,000 27,000,000      
Inventory 2,200,000 4,200,000      
Write-off of deferred debt issuance costs $ 8,900,000