XML 98 R76.htm IDEA: XBRL DOCUMENT v3.3.1.900
Receivables (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Receivables [Abstract]    
Allowance for Doubtful Accounts Receivable   $ 0
Receivables - current portion    
Accounts receivable - trade $ 17,878 20,448
Refundable income tax 13,678 21,047
Refundable value added tax 50,669 63,805
Accounts receivable - other 3,767 2,623
Receivables, net current portion 85,992 107,923
Receivables - non-current portion    
Refundable value added tax 24,768 21,686
Receivables, Total $ 110,760 $ 129,609