Earnings Per Share Table (Detail) - shares
 3 Months Ended 6 Months Ended
May. 31, 2015
May. 31, 2014
May. 31, 2015
May. 31, 2014
Earnings Per Share [Line Items]        
Weighted average shares-basic 55,472,798 55,446,463 55,466,944 55,436,440
Effect of dilutive securities [1]        
Weighted average shares-diluted 55,472,798 55,446,463 55,466,944 55,436,440
[1] Outstanding options and RSUs aggregating 2,132,127 incremental shares at May 31, 2015 (1,638,269 at May 31, 2014), and 892,862 warrants at May 31, 2014, have been excluded from the May 31, 2015 and 2014 computations of diluted EPS as they are anti-dilutive due to the losses generated in each respective period.