Receivables (Tables)

9 Months Ended

Sep. 30, 2011

Receivables [Abstract]

Receivables

	September 30, 2011		December 31, 2010
Receivables - current portion
Accounts receivable - trade	$	22,078	$	14,062
Refundable income tax		11,020		5,363
Refundable value added tax		47,370		36,947
Accounts receivable - other		3,685		2,508
	$	84,153	$	58,880
Receivables - non-current portion
Refundable value added tax	$	41,329	$	42,866