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Consolidated Statements of Shareholders' Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Loss [Member]
Beginning balance, shares at Jun. 30, 2014   28,539,481    
Beginning balance, amount at Jun. 30, 2014 $ 802,643 $ 168,447 $ 650,896 $ (16,700)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income 65,419   65,419  
Unrealized gain (loss) on hedged transaction, net of tax 0      
Foreign currency translation adjustment (47,802)     (47,802)
Exercise of stock options and shares issued under share-based compensation plans, net of shares withheld for employee taxes, shares   154,497    
Exercise of stock options and shares issued under share-based compensation plans, net of shares withheld for employee taxes 760 $ 760    
Common stock repurchased, shares   (479,825)    
Common stock repurchased (18,768) $ (18,768)    
Share based compensation 6,517 6,517    
Tax benefit (shortfall) arising from exercise or vesting of share-based payment arrangements 216 $ 216    
Ending balance, shares at Jun. 30, 2015   28,214,153    
Ending balance, amount at Jun. 30, 2015 808,985 $ 157,172 716,315 (64,502)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income 63,619   63,619  
Unrealized gain (loss) on hedged transaction, net of tax 0      
Foreign currency translation adjustment (8,185)     (8,185)
Exercise of stock options and shares issued under share-based compensation plans, net of shares withheld for employee taxes, shares   284,730    
Exercise of stock options and shares issued under share-based compensation plans, net of shares withheld for employee taxes 3,994 $ 3,994    
Common stock repurchased, shares   (2,884,210)    
Common stock repurchased (100,751) $ (100,751)    
Share based compensation 7,093 7,093    
Tax benefit (shortfall) arising from exercise or vesting of share-based payment arrangements $ (259) $ (259)    
Ending balance, shares at Jun. 30, 2016 25,614,673 25,614,673    
Ending balance, amount at Jun. 30, 2016 $ 774,496 $ 67,249 779,934 (72,687)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income 69,246   69,246  
Unrealized gain (loss) on hedged transaction, net of tax 13     13
Foreign currency translation adjustment (530)     (530)
Exercise of stock options and shares issued under share-based compensation plans, net of shares withheld for employee taxes, shares   394,815    
Exercise of stock options and shares issued under share-based compensation plans, net of shares withheld for employee taxes $ 8,208 $ 8,208    
Common stock repurchased, shares (600,000) (577,643)    
Common stock repurchased $ (20,335) $ (20,335)    
Share based compensation 6,578 6,578    
Tax benefit (shortfall) arising from exercise or vesting of share-based payment arrangements $ (531) $ (531)    
Ending balance, shares at Jun. 30, 2017 25,431,845 25,431,845    
Ending balance, amount at Jun. 30, 2017 $ 837,145 $ 61,169 $ 849,180 $ (73,204)