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Receivables (Tables)
 9 Months Ended
Sep. 30, 2013
Receivables [Abstract]  
Receivables
Receivables consist of the following (in thousands):
 
September 30, 2013
 
December 31, 2012
Receivables - current
 
 
 
Accounts receivable - trade
$
16,295

 
$
8,701

Refundable income tax
8,330

 
9,331

Refundable value added tax
46,242

 
40,020

Accounts receivable - other
3,550

 
4,386

 
$
74,417

 
$
62,438

Receivables - non-current
 
 
 
Refundable value added tax
$
37,191

 
$
48,767