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Unaudited Quarterly Financial Information (Notes)
 12 Months Ended
Jul. 31, 2018
Quarterly Financial Information Disclosure [Abstract]  
Unaudited Quarterly Financial Information
Unaudited Quarterly Financial Information
 
 
Quarters
 
 
First
 
Second
 
Third
 
Fourth
 
Total
Fiscal 2017
 
 
 
 
 
 
 
 
 
 
Net sales
 
$
280,176

 
$
268,001

 
$
275,927

 
$
289,212

 
$
1,113,316

Gross margin
 
140,358

 
134,158

 
139,909

 
143,867

 
558,292

Operating income
 
33,208

 
29,962

 
31,550

 
36,295

 
131,015

Net earnings
 
22,553

 
25,297

 
22,553

 
25,242

 
95,645

Net earnings per Class A Nonvoting Common Share:
 
 
 
 
 
 
 
 
 
 
Basic *
 
$
0.45

 
$
0.50

 
$
0.44

 
$
0.49

 
$
1.87

Diluted
 
$
0.44

 
$
0.49

 
$
0.43

 
$
0.48

 
$
1.84

Fiscal 2018
 
 
 
 
 
 
 
 
 
 
Net sales
 
$
290,151

 
$
287,780

 
$
298,421

 
$
297,499

 
$
1,173,851

Gross margin
 
146,065

 
143,692

 
151,082

 
147,452

 
588,291

Operating income
 
35,411

 
34,796

 
37,709

 
44,780

 
152,696

Net earnings
 
25,836

 
4,273

 
26,000

 
34,951

 
91,060

Net earnings per Class A Nonvoting Common Share:
 
 
 
 
 
 
 
 
 
 
Basic *
 
$
0.50

 
$
0.08

 
$
0.50

 
$
0.67

 
$
1.76

Diluted *
 
$
0.49

 
$
0.08

 
$
0.49

 
$
0.66

 
$
1.73


* The sum of the quarters does not equal the year-to-date total for fiscal 2017 or 2018 due to the quarterly changes in weighted-average shares outstanding.