Property, Plant and Equipment (Tables)

12 Months Ended

Sep. 30, 2023

Property, Plant and Equipment

Summary of the major classes of property, plant and equipment

	September 30,
	2022		2023
Land and land improvements	$	10,158	$	10,418
Buildings and improvements		45,872		46,931
Machinery and equipment		313,841		321,676
Construction in process		8,756		16,704
		378,627		395,729
Less accumulated depreciation		(235,855)		(253,189)
	$	142,772	$	142,540