Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details)

v3.19.3
Stockholders' Equity (Details) - shares
 3 Months Ended 6 Months Ended
Aug. 31, 2019
May 31, 2019
Aug. 31, 2018
May 31, 2018
Aug. 31, 2019
Aug. 31, 2018
Class A Common Stock [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Common Stock, beginning of period   185,740,178     185,740,178  
Treasury Stock, beginning of period   18,927,966     18,927,966  
Common Stock, end of period 185,880,112       185,880,112  
Treasury Stock, end of period 18,604,964       18,604,964  
Class B Convertible Common Stock [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Common Stock, beginning of period   28,322,419     28,322,419  
Treasury Stock, beginning of period   5,005,800     5,005,800  
Common Stock, end of period 28,321,821       28,321,821  
Treasury Stock, end of period 5,005,800       5,005,800  
Common Stock [Member] | Class A Common Stock [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Common Stock, beginning of period 185,873,845 185,740,178 258,940,446 258,718,356 185,740,178 258,718,356
Conversion of shares 6,267 133,667 2,500 5,144    
Exercise of stock options 0 0 137,219 216,946    
Common Stock, end of period 185,880,112 185,873,845 259,080,165 258,940,446 185,880,112 259,080,165
Share repurchases 0   0 0    
Employee stock purchases 0   0      
Grant of restricted stock awards     0      
Common Stock [Member] | Class A Common Stock [Member] | Restricted stock units [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Vesting of stock units 0 0 0 0    
Common Stock [Member] | Class A Common Stock [Member] | Performance share units [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Vesting of stock units   0   0    
Common Stock [Member] | Class A Common Stock [Member] | Restricted shares [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Cancellation of restricted shares   0        
Common Stock [Member] | Class B Convertible Common Stock [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Common Stock, beginning of period 28,322,364 28,322,419 28,330,243 28,335,387 28,322,419 28,335,387
Conversion of shares (543) (55) (2,500) (5,144)    
Exercise of stock options 0 0 0 0    
Common Stock, end of period 28,321,821 28,322,364 28,327,743 28,330,243 28,321,821 28,327,743
Share repurchases 0   0 0    
Employee stock purchases 0   0      
Grant of restricted stock awards     0      
Common Stock [Member] | Class B Convertible Common Stock [Member] | Restricted stock units [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Vesting of stock units 0 0 0 0    
Common Stock [Member] | Class B Convertible Common Stock [Member] | Performance share units [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Vesting of stock units   0   0    
Common Stock [Member] | Class B Convertible Common Stock [Member] | Restricted shares [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Cancellation of restricted shares   0        
Common Stock [Member] | Class 1 Common Stock [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Common Stock, beginning of period 1,018,119 1,149,624 7,088 1,970 1,149,624 1,970
Conversion of shares (5,724) (133,612) 0 0    
Exercise of stock options 0 2,107 2,325 5,118    
Common Stock, end of period 1,012,395 1,018,119 9,413 7,088 1,012,395 9,413
Share repurchases 0   0 0    
Employee stock purchases 0   0      
Grant of restricted stock awards     0      
Common Stock [Member] | Class 1 Common Stock [Member] | Restricted stock units [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Vesting of stock units 0 0 0 0    
Common Stock [Member] | Class 1 Common Stock [Member] | Performance share units [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Vesting of stock units   0   0    
Common Stock [Member] | Class 1 Common Stock [Member] | Restricted shares [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Cancellation of restricted shares   0        
Treasury Stock [Member] | Class A Common Stock [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Treasury Stock, beginning of period 18,636,987 18,927,966 91,111,003 90,743,239 18,927,966 90,743,239
Conversion of shares 0 0 0 0    
Exercise of stock options (258,628) (173,725) 0 0    
Treasury Stock, end of period 18,604,964 18,636,987 92,971,811 91,111,003 18,604,964 92,971,811
Share repurchases 265,593   1,901,637 450,508    
Employee stock purchases (36,840)   (34,203)      
Grant of restricted stock awards     (3,552)      
Treasury Stock [Member] | Class A Common Stock [Member] | Restricted stock units [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Vesting of stock units (2,148) (88,683) (3,074) (20,392)    
Shares withheld to satisfy tax withholding requirements 1,176 48,562 2,211 12,743 49,738 14,954
Treasury Stock [Member] | Class A Common Stock [Member] | Performance share units [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Vesting of stock units   (29,015)   (62,352)    
Shares withheld to satisfy tax withholding requirements 0 17,439 0 44,016 17,439 44,016
Treasury Stock [Member] | Class A Common Stock [Member] | Restricted shares [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Cancellation of restricted shares   444        
Treasury Stock [Member] | Class B Convertible Common Stock [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Treasury Stock, beginning of period 5,005,800 5,005,800 5,005,800 5,005,800 5,005,800 5,005,800
Conversion of shares 0 0 0 0    
Exercise of stock options 0 0 0 0    
Treasury Stock, end of period 5,005,800 5,005,800 5,005,800 5,005,800 5,005,800 5,005,800
Share repurchases 0   0 0    
Employee stock purchases 0   0      
Grant of restricted stock awards     0      
Treasury Stock [Member] | Class B Convertible Common Stock [Member] | Restricted stock units [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Vesting of stock units 0 0 0 0    
Treasury Stock [Member] | Class B Convertible Common Stock [Member] | Performance share units [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Vesting of stock units   0   0    
Treasury Stock [Member] | Class B Convertible Common Stock [Member] | Restricted shares [Member]            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Cancellation of restricted shares   0