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Long-Term Debt - Corporate Level Long-Term Debt Narrative (Details)
Sep. 08, 2016
Sep. 02, 2016
May 31, 2016
May 06, 2016
USD ($)
requirement
Jun. 30, 2016
USD ($)
Dec. 31, 2015
USD ($)
Revolving credit facility | Global Operating LLC Revolver            
Debt Instrument [Line Items]            
Line of credit outstanding         $ 135,000,000 $ 135,000,000
Line of credit, borrowing capacity       $ 350,000,000    
Revolving credit facility | Global Operating LLC Revolver | Global Operating LLC            
Debt Instrument [Line Items]            
Debt instrument, debt covenant, grace period for annual report       75 days    
Debt covenant, number of requirements | requirement       3    
Revolving credit facility | Global Operating LLC Revolver | Global Operating LLC | Alto Cielo Preliminary            
Debt Instrument [Line Items]            
Amount of letters of credit outstanding         $ 0 $ 500,000
Senior notes | 9.75% Senior Notes due 2022 | Global Operating LLC            
Debt Instrument [Line Items]            
Debt instrument, debt covenant, grace period for annual report     60 days      
Senior notes | 9.75% Senior Notes due 2022 | Global Operating LLC | Subsequent event            
Debt Instrument [Line Items]            
Redemption price, percentage 101.00% 101.00%