Property, Plant, and Equipment (Tables)

12 Months Ended

Sep. 30, 2019

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

Estimated useful lives for major classes of depreciable assets are as follows:

Asset Class	Estimated Useful Life
Machinery and equipment	3 to 20 years
Buildings and improvements	10 to 40 years

Property, plant, and equipment consists of the following:

	September 30, 2019			September 30, 2018
Machinery and equipment	$	488,924		$	399,619
Land and buildings	64,165			76,459
Construction in process	40,599			60,803
	593,688			536,881
Less: accumulated depreciation	(260,104		)	(216,858		)
Property, plant, and equipment, net	$	333,584		$	320,023

Depreciation expense and maintenance and repairs expense for the years ended September 30, 2019, 2018 and 2017 were as follows:

	Year Ended September 30,
	2019		2018		2017
Depreciation expense	$	66,031	$	59,017	$	53,327
Maintenance and repair expense	23,861		23,343		21,392

Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]

As of September 30, 2019, the gross and net amounts of those assets are as follows:

	Gross		Net
Machinery and equipment	$	48,288	$	42,162
Construction in process	2,531		2,531
	$	50,819	$	44,693