Summary of Significant Accounting Policies Inventories (Tables)

12 Months Ended

Jul. 31, 2021

Accounting Policies [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consist of the following as of July 31:

	2021		2020
Finished products	$	87,489	$	85,547
Work-in-process	20,189		24,044
Raw materials and supplies	28,429		26,071
Total inventories	$	136,107	$	135,662

Property, Plant and Equipment [Table Text Block]

Property, plant and equipment consist of the following as of July 31:

	Range of Useful Lives	2021		2020
Land		$	8,201	$	9,960
Buildings and improvements	10 to 33 Years	108,801		105,129
Machinery and equipment	3 to 10 Years	276,994		267,795
Construction in progress		4,991		8,432
Property, plant and equipment—gross		398,987		391,316
Accumulated depreciation		(277,246)		(276,248)
Property, plant and equipment—net		$	121,741	$	115,068