XML 90 R59.htm IDEA: XBRL DOCUMENT v3.19.1
Long-term debt - Schedule of Long Term Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Aug. 23, 2013
Disclosure of detailed information about borrowings [line items]      
Principal $ 479,535 $ 702,181  
Current portion of long-term debt (25,008) (302,630)  
Long-term debt 454,527 399,551  
Convertible senior subordinated notes:      
Disclosure of detailed information about borrowings [line items]      
Principal 0 277,650  
Revolving credit facility:      
Disclosure of detailed information about borrowings [line items]      
Principal 395,822 344,149  
Fekola Equipment Loan Facility      
Disclosure of detailed information about borrowings [line items]      
Principal 57,242 50,569  
Otjikoto equipment loan facility (net of unamortized transaction costs)      
Disclosure of detailed information about borrowings [line items]      
Principal 10,816 20,750  
Masbate Equipment Loan Facility      
Disclosure of detailed information about borrowings [line items]      
Principal 13,071 7,719  
Finance lease obligations      
Disclosure of detailed information about borrowings [line items]      
Principal 2,186 0  
Nicaraguan equipment loans      
Disclosure of detailed information about borrowings [line items]      
Principal 398 1,344  
Equipment loans/finance lease obligations:      
Disclosure of detailed information about borrowings [line items]      
Principal 83,713 80,382  
Principal | Convertible senior subordinated notes:      
Disclosure of detailed information about borrowings [line items]      
Principal 0 258,750 $ 259,000
Principal | Revolving credit facility:      
Disclosure of detailed information about borrowings [line items]      
Principal 400,000 350,000  
Principal | Fekola Equipment Loan Facility      
Disclosure of detailed information about borrowings [line items]      
Principal 58,634    
Principal | Otjikoto equipment loan facility (net of unamortized transaction costs)      
Disclosure of detailed information about borrowings [line items]      
Principal 10,922    
Principal | Masbate Equipment Loan Facility      
Disclosure of detailed information about borrowings [line items]      
Principal 13,526    
Principal | Finance lease obligations      
Disclosure of detailed information about borrowings [line items]      
Principal 2,186    
Principal | Nicaraguan equipment loans      
Disclosure of detailed information about borrowings [line items]      
Principal 398    
Fair value adjustment | Convertible senior subordinated notes:      
Disclosure of detailed information about borrowings [line items]      
Principal 0 18,900  
Unamortized Transaction Costs | Revolving credit facility:      
Disclosure of detailed information about borrowings [line items]      
Principal $ (4,178) $ (5,851)