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Earnings per Share (Tables)
 12 Months Ended
Jun. 30, 2017
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table presents the calculations of earnings per share:

Years ended June 30,
2017
 
2016
 
2015
(In thousands except per share data)
 
 
 
 
 
Net earnings
$
188,928

 
$
33,937

 
$
136,791

Basic average shares outstanding
44,617

 
44,606

 
44,522

Dilutive effect of stock options and equivalents
830

 
751

 
801

Diluted average shares outstanding
45,447

 
45,357

 
45,323

Earnings per share
 
 
 
 
 
Basic
$
4.23

 
$
0.76

 
$
3.07

Diluted
4.16

 
0.75

 
3.02