XML 18 R27.htm IDEA: XBRL DOCUMENT  v2.3.0.11
Employee Stock Plans (Narrative) (Details) (USD $)
 3 Months Ended 3 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended
Jul. 31, 2011
Jul. 31, 2010
Jun. 30, 2002
Jul. 31, 2011
Stock Options And SARs [Member]
years
Apr. 30, 2011
Stock Options And SARs [Member]
Jul. 31, 2011
Restricted Stock [Member]
years
Jul. 31, 2010
Restricted Stock [Member]
Apr. 30, 2011
Restricted Stock [Member]
Jul. 31, 2011
SARs [Member]
Jul. 31, 2011
ESPP [Member]
Jul. 31, 2010
ESPP [Member]
Common stock for stock-based compensation awards 2,360,000                    
Weighted-average exercise price       $ 13.82 $ 13.78       $ 8.00    
Total unrecognized compensation cost related to non-vested awards of stock options, SARs and Restricted Stock       $ 2,700,000   $ 25,800,000          
Expected cost recognized over weighted-average period       1.4   2.5          
Shares repurchased during the period 0 566,639       176,658 181,947        
Common stock repurchased, Value   8,500,000       4,000,000 2,600,000        
Authorized payroll deductions                   15.00%  
Authorized payroll deductions, Value                   25,000  
Fair market price of common stock                   85.00%  
Maximum number of shares of common stock reserved for ESPP issuance                   1,500,000  
Employees stock purchased                   76,909 108,425
Employees stock purchased, per share value                   $ 18.69 $ 11.82
Shares available for future issuance                   100,000  
Stock issued for stock options exercised 113,686 26,768                  
Vesting Period (years)           three   three      
Warrants issued     274,207                
Common stock at an exercise price     $ 11.94                
Shares of Common Stock issued in exchange for warrants   274,207                  
Proceeds from Issuance of Warrants   $ 2,983,000                  
Options Exercisable       1,201,000         14,153