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Share-Based Compensation (Narrative) (Details) (USD $)
3 Months Ended 0 Months Ended 3 Months Ended 0 Months Ended 3 Months Ended
Nov. 30, 2013
Dec. 01, 2012
Aug. 31, 2013
Nov. 22, 2013
Performance Awards [Member]
Nov. 30, 2013
Performance Awards [Member]
Dec. 01, 2012
Performance Awards [Member]
Oct. 02, 2013
Performance Awards [Member]
Sep. 18, 2013
Performance Awards [Member]
Nov. 22, 2013
Performance Awards [Member]
Minimum [Member]
Nov. 22, 2013
Performance Awards [Member]
Maximum [Member]
Nov. 22, 2013
Performance Awards [Member]
3 Years Or Less [Member]
Nov. 22, 2013
Performance Awards [Member]
3 To 5 Years [Member]
Nov. 22, 2013
Performance Awards [Member]
After 5 Years [Member]
Nov. 30, 2013
Unvested Share Awards [Member]
Dec. 01, 2012
Unvested Share Awards [Member]
Nov. 30, 2013
Adjusted EBITDA [Member]
Performance Awards [Member]
item
Nov. 30, 2013
Sales Of Courses [Member]
Performance Awards [Member]
item
Nov. 30, 2013
Tranche One [Member]
Adjusted EBITDA [Member]
Performance Awards [Member]
Nov. 30, 2013
Tranche One [Member]
Sales Of Courses [Member]
Performance Awards [Member]
Nov. 30, 2013
Tranche Two [Member]
Adjusted EBITDA [Member]
Stock Options [Member]
Nov. 30, 2013
Tranche Two [Member]
Sales Of Courses [Member]
Performance Awards [Member]
Nov. 30, 2013
Tranche Three [Member]
Adjusted EBITDA [Member]
Stock Options [Member]
Nov. 30, 2013
Tranche Three [Member]
Sales Of Courses [Member]
Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                              
Shares available for granting       8,352                                      
Period which common stock price must average over specified levels       5 days                                      
Period to achieve specified levels of common stock price                 3 years 5 years                          
Percent of shares which will vest                     100.00% 50.00% 0.00%                    
Unrecognized compensation cost                           $ 33,000                  
Number of tranches                               3 3            
Shares authorized to be issued         89,418                                    
Shares to vest after meeting certain requirements                               20,864 8,942            
Adjusted EBITDA                                   37,000,000   43,000,000   49,000,000  
Sales of 7 Habits courses                                     5,000,000   10,000,000   12,500,000
Life of performance awards         6 years                                    
Vesting price per share       $ 22.00     $ 19.00 $ 17.00                              
Grant date fair value of common stock             $ 18.05 $ 17.62                              
Compensation cost 1,262,000 473,000     1,136,000 346,000               100,000 88,000                
Exercise price $ 11.41   $ 11.25                                        
Intrinsic value of stock options exercised 500,000                                            
Whole-share grant per eligible director                           $ 50,000                  
Vesting period of awards                           1 year                  
Shares issued under terms of the award 508,000                         30,672                  
Price of common stock as a percent of the average fair market value 85.00%                                            
Shares issued to employee stock purchase plan participants 9,928