Receivables (Tables)

6 Months Ended

Jun. 30, 2011

Receivables (Tables) [Abstract]

Receivables

	June 30,		December 31,
	2011		2010
Receivables — current portion
Accounts receivable — trade	$	17,337	$	14,062
Refundable income tax		6,994		5,363
Refundable value added tax		47,322		36,947
Accounts receivable — other		2,971		2,508
	$	74,624	$	58,880
Receivables — non-current portion
Refundable value added tax	$	40,941	$	42,866