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Long-Term Debt and Interest Expense - Narrative (Details)
Jun. 30, 2016
May 31, 2016
Feb. 26, 2016
USD ($)
Oct. 16, 2016
USD ($)
Sep. 30, 2016
USD ($)
Sep. 01, 2016
USD ($)
Aug. 31, 2016
a
Feb. 25, 2016
USD ($)
Feb. 17, 2016
USD ($)
Term Loan                  
Debt Instrument [Line Items]                  
Aggregate principal amount                 $ 165,000,000.0
Delayed draw term loan borrowings, maximum                 $ 15,000,000.0
Proceeds released upon closing     49.10%            
Initial percentage of collateral subject to a perfected lien, not less than     49.10%            
Additional proceeds released 10.00% 26.00%              
Percentage of collateral subject to a perfected lien, not less than 85.00%                
Remaining percentage of collateral subject to a perfect lien, not less than             95.00%    
Lenders' fees, percentage of principal amount         7.00%        
Debt covenant, required perfected percentage, minimum             95.00%    
Approved sale under waiver (in acres) | a             0.513    
Debt covenant, unrestricted cash balance, minimum           $ 50,000,000      
Modified Facility                  
Debt Instrument [Line Items]                  
Stated interest rate         13.50%        
Revolving credit facility, borrowing capacity     $ 100,000,000.0         $ 250,000,000  
Allowable borrowing capacity     $ 180,000,000            
Borrowings         $ 0        
Letters of credit outstanding         51,100,000        
Available borrowing capacity         $ 16,400,000        
Subsequent Event | Term Loan                  
Debt Instrument [Line Items]                  
Debt covenant, unrestricted cash balance, minimum       $ 6,500,000