Property, Plant, and Equipment (Tables)

12 Months Ended

Sep. 30, 2021

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, 2021		September 30, 2020
Machinery and equipment	$	388,352	$	357,650
Rental equipment	246,257		221,953
Land and buildings	70,048		70,245
Construction in process	59,737		48,325
	$	764,394	$	698,173
Less: accumulated depreciation	(389,406)		(333,712)
Property, plant, and equipment, net	$	374,988	$	364,461

Depreciation expense and maintenance and repairs expense for the years ended September 30, 2021, 2020 and 2019 were as follows:

	Year Ended September 30,
	2021		2020		2019
Depreciation expense	$	76,279	$	73,002	$	66,031
Maintenance and repair expense	$	22,354	$	20,303	$	23,861

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

The Company entered into secured financing agreements that require providing a security interest in specified equipment. As of September 30, 2021 and September 30, 2020, the gross and net amounts of those assets are as follows:

	September 30, 2021				September 30, 2020
	Gross		Net		Gross		Net
Machinery and equipment	$	89,115	$	72,666	$	63,305	$	52,620
Construction in process	30,504		30,504		8,098		8,098
	$	119,619	$	103,170	$	71,403	$	60,718