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EARNINGS PER SHARE (Tables)
 12 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Calculation of basic and diluted earnings per share

Earnings per share and the weighted-average number of diluted shares are computed as follows (in thousands, except per share data):

 

 

 

Year ended June 30,

 

 

 

2018

 

 

2017

 

 

2016

 

Net income

 

$

301,171

 

 

$

163,671

 

 

$

142,799

 

Weighted-average number of basic shares outstanding

   during the period

 

 

24,616

 

 

 

24,401

 

 

 

24,262

 

Dilutive effect of SSARs/stock options and RSUs/restricted

   shares after application of treasury stock method

 

 

639

 

 

 

668

 

 

 

540

 

Weighted-average number of diluted shares outstanding

   during the period

 

 

25,255

 

 

 

25,069

 

 

 

24,802

 

Basic earnings per share

 

$

12.23

 

 

$

6.71

 

 

$

5.89

 

Diluted earnings per share

 

$

11.93

 

 

$

6.53

 

 

$

5.76