SHAREHOLDERS' EQUITY (Tables)

9 Months Ended

Sep. 30, 2012

SHAREHOLDERS' EQUITY

Schedule of maximum number of common shares that would be outstanding if all instruments outstanding were exercised

Common shares outstanding at September 30, 2012	171,578,933
Employees' stock options	10,867,426
Warrants	8,600,000
Restricted share unit plan	233,860
	191,280,219

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

	Three months ended September 30,					Nine months ended September 30,
	2012		2011			2012		2011
Net income (loss) for the period	$	106,326	$	(81,614	)	$	228,146	$	32,475
Weighted average number of common shares outstanding — basic (in thousands)		171,341		169,238			171,055		169,055
Add: Dilutive impact of employee stock options		—		—			—		1,094
Dilutive impact of warrants		—		—			—		2,447
Dilutive impact of shares related to RSU plan		255		—			242		50
Weighted average number of common shares outstanding — diluted (in thousands)		171,596		169,238			171,297		172,646
Net income (loss) per share — basic	$	0.62	$	(0.48	)	$	1.33	$	0.19
Net income (loss) per share — diluted	$	0.62	$	(0.48	)	$	1.33	$	0.19