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Net Earnings (Loss) Per Common Unitholders' Interest (Tables)
 3 Months Ended
Oct. 31, 2013
Earnings Per Share [Abstract]  
Basic And Diluted Net Loss Per Common Unitholders' Interest
 
 
For the three months ended October 31,
 
 
2013
 
2012
 
 
(in thousands, except per unitholders' interest amounts)
Common unitholders’ interest in net loss
 
$
(24,595
)
 
$
(17,481
)
 
 
 
 
 
Weighted average common units outstanding - basic
 
79,075.8

 
79,013.3

Dilutive securities
 
—

 
—

Weighted average common units outstanding - diluted
 
79,075.8

 
79,013.3

 
 
 
 
 
Basic and diluted net loss per common unitholders’ interest
 
$
(0.31
)
 
$
(0.22
)