Summary of Significant Accounting Policies Property, plant and equipment (Tables)

12 Months Ended

Jul. 31, 2020

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

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

	Range of Useful Lives	2020		2019
Land		$	9,960	$	9,752
Buildings and improvements	10 to 33 Years	105,129		99,685
Machinery and equipment	3 to 10 Years	267,795		266,991
Construction in progress		8,432		7,500
Property, plant and equipment—gross		391,316		383,928
Accumulated depreciation		(276,248)		(273,880)
Property, plant and equipment—net		$	115,068	$	110,048