XML 133 R102.htm IDEA: XBRL DOCUMENT v3.19.1
Employee Compensation and Benefits Expense (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of employee benefits [Abstract]    
Wages, salaries and bonuses $ 181,957 $ 184,225
Share-based compensation 2,957 3,077
Total employee compensation and benefit expenses 184,914 187,302
Less: Expensed within General and Administrative expenses (13,919) (14,023)
Less: Expensed within Exploration expenses (3,116) (4,170)
Employee compensation and benefits expenses included in production costs $ 167,879 $ 169,109