ACCOUNTS RECEIVABLE (Tables)

12 Months Ended

Dec. 31, 2012

ACCOUNTS RECEIVABLE

Schedule of components of accounts receivable

	2012			2011
Trade receivables	$	96,779		$	101,130
Less: allowance for doubtful accounts	(2,435		)	(3,642		)
	94,344			97,488
Sales taxes receivable	2,594			1,825
Other receivables	11,686			8,054
	$	108,624		$	107,367

Schedule of movement in the allowance for doubtful accounts

	2012			2011
Balance, beginning of year	$	3,642		$	4,606
Bad debt expense	386			(83		)
Write-offs and settlements	(1,608		)	(827		)
Foreign exchange	15			(54		)
	$	2,435		$	3,642