(LOSS) EARNINGS PER SHARE (Tables)

12 Months Ended

Dec. 31, 2012

(LOSS) EARNINGS PER SHARE

Schedule of calculation of earnings per share

	2012			2011		2010
Net (loss) income	$	(116,025	)	$	159,559	$	(208,193	)
Basic weighted-average number of common shares outstanding (000s)	305,446			304,655		195,808
Dilutive effect of stock options and RSUs (000s)	—			8,484		—
Dilutive effect of convertible debt (000s)	—			12,980		—
Diluted weighted-average number of common shares outstanding (000s)	305,446			326,119		195,808
Basic (loss) earnings per share	$	(0.38	)	$	0.52	$	(1.06	)
Diluted (loss) earnings per share	$	(0.38	)	$	0.49	$	(1.06	)

Schedule of dilutive effect of stock options, RSUs and Convertible Notes on weighted-average number of common shares outstanding

	2012	2010
Basic weighted-average number of common shares outstanding (000s)	305,446	195,808
Dilutive effect of stock options and RSUs (000s)	7,158	2,774
Dilutive effect of Convertible Notes (000s)	520	6,947
Diluted weighted-average number of common shares outstanding (000s)	313,124	205,529