Net Earnings (Loss) Per Common Unitholders' Interest (Tables)

12 Months Ended

Jul. 31, 2011

Net Earnings (Loss) Per Common Unitholders' Interest

Basic And Diluted Net Earnings Per Common Unitholders' Interest

	For the year ended July 31,
	2011	2010	2009
Common unitholders' interest in net earnings (loss)	$(43,212)	$32,382	$52,046
Weighted average common units outstanding (in thousands)	72,313.6	69,241.7	65,540.7
Dilutive securities	-	131.8	72.7
Weighted average common units   outstanding plus dilutive securities	72,313.6	69,373.5	65,613.4
Basic and diluted net earnings (loss) per common unitholders' interest	$(0.60)	$0.47	$0.79