Property, Plant and Equipment (Tables)

12 Months Ended

Sep. 30, 2017

Property, Plant and Equipment

Summary of the major classes of property, plant and equipment

	September 30,
	2016		2017
Land and land improvements	$	7,207	$	9,345
Buildings and improvements		37,343		44,705
Machinery and equipment		262,717		289,035
Construction in process		28,562		5,692
		335,829		348,777
Less accumulated depreciation		(136,647)		(156,221)
	$	199,182	$	192,556