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Reportable Segments (Tables)
 3 Months Ended
Oct. 31, 2020
Segment Reporting [Abstract]  
Information as to reportable segments
Information as to reportable segments is summarized below
 Three Months Ended October 31,
Net sales20202019
Medical$132,319 $133,353 
Life Sciences45,568 49,141 
Dental111,006 67,243 
Dialysis8,136 7,509 
Total net sales$297,029 $257,246 
 Three Months Ended October 31,
Income from operations20202019
Medical$26,716 $21,119 
Life Sciences8,075 7,135 
Dental25,307 5,004 
Dialysis2,566 1,622 
 62,664 34,880 
General corporate expenses(1)
12,312 20,456 
Total income from operations$50,352 $14,424 
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(1)The three months ended October 31, 2019 includes acquisition-related charges incurred in connection with the Hu-Friedy acquisition.