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Consolidated Statements of Stockholders' Equity (USD $)
In Thousands, except Share data, unless otherwise specified
Total
Common Stock and Additional Paid-In Capital [Member]
Treasury Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Retained Earnings [Member]
Noncontrolling Interest [Member]
Balance at Jun. 30, 2011 $ 287,257 $ 122,693 $ (2,030) $ (204) $ 166,798  
Shares outstanding at Jun. 30, 2011   40,727,562 (445,028)      
Increase (Decrease) in Stockholders' Equity            
Exercise of stock options, shares 1,211,070 1,211,070        
Exercise of stock options 8,549 8,549        
Issuance of restricted stock awards, net of taxes, shares   95,784        
Issuance of restricted stock awards, net of taxes, value (1,109) (1,109)        
Stock-based compensation 10,252 10,252        
Tax benefit resulting from stock option transactions 3,421 3,421        
Unrealized gains on investments 128     128    
Translation adjustments 0          
Net income 29,853       29,853  
Balance at Jun. 30, 2012 338,351 143,806 (2,030) (76) 196,651  
Shares outstanding at Jun. 30, 2012   42,034,416 (445,028)      
Increase (Decrease) in Stockholders' Equity            
Exercise of stock options, shares 612,034 612,034        
Exercise of stock options 1,845 1,845        
Issuance of restricted stock awards, net of taxes, shares   98,050        
Issuance of restricted stock awards, net of taxes, value (1,034) (1,034)        
Stock-based compensation 11,361 11,361        
Tax benefit resulting from stock option transactions 1,734 1,734        
Unrealized gains on investments 8     8    
Translation adjustments (1)     (1)    
Investment in noncontrolling interest 168         168
Net income 21,292       21,279 13
Balance at Jun. 30, 2013 373,724 157,712 (2,030) (69) 217,930 181
Shares outstanding at Jun. 30, 2013   42,744,500 (445,028)      
Increase (Decrease) in Stockholders' Equity            
Exercise of stock options, shares 2,863,878 2,863,878        
Exercise of stock options 23,928 23,928        
Issuance of restricted stock awards, net of taxes, shares   131,558        
Issuance of restricted stock awards, net of taxes, value (681) (681)        
Stock-based compensation 11,062 11,062        
Tax benefit resulting from stock option transactions 7,041 7,041        
Unrealized gains on investments 6     6    
Translation adjustments 0          
Net income 54,151       54,157 (6)
Balance at Jun. 30, 2014 $ 469,231 $ 199,062 $ (2,030) $ (63) $ 272,087 $ 175
Shares outstanding at Jun. 30, 2014   45,739,936 (445,028)