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Common Shares and Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Feb. 28, 2014
Feb. 29, 2016
Feb. 28, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common shares, authorized   100 100
Common shares, outstanding   100 100
Stock-based compensation $ 8,091    
Stock compensation expense 4,125    
Incremental compensation expense associated with settlement of stock options,non-executive directors awards and attributable to modified awards 5,721    
Cash received from stock options exercised 1,718    
Total intrinsic value of options exercised 6,298    
Actual tax benefit realized from the exercise of stock-based payment arrangements 2,486    
Administrative and General Expenses [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation 13,812    
Cancellation of Family Shareholders Performance Share and Restricted Stock Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Incremental stock based compensation expense $ 3,966