SHAREHOLDERS' EQUITY (Tables)

12 Months Ended

Dec. 31, 2012

SHAREHOLDERS' EQUITY

Components of accumulated other comprehensive loss, net of related tax effects

		As at December 31,
		2012			2011
Cumulative translation adjustment	$	(16,206	)	$	(16,206	)
Unrealized net (loss) gain on available-for-sale securities		(7,680	)		16,350
Unrealized loss on derivative financial instruments		(260	)		(4,404	)
Unrealized loss on pension benefits liability		(4,071	)		(5,219	)
Tax effect of unrealized loss on derivative financial instruments		397			1,491
Tax effect of unrealized loss on pension benefits liability		509			882
Accumulated other comprehensive loss	$	(27,311	)	$	(7,106	)

Schedule of reconciliation for weighted average number of common shares in calculation of basic and diluted income (loss) per share

	Years Ended December 31,
	2012	2011	2010
Weighted average number of common shares outstanding – basic	171,250,179	169,352,896	162,342,686
Add: Dilutive impact of employee stock options	–	–	1,192,530
Dilutive impact of warrants	–	–	2,263,902
Dilutive impact of shares related to RSU plan	235,436	–	43,141
Weighted average number of common shares outstanding – diluted	171,485,615	169,352,896	165,842,259