Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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The aggregate costs of keeping the property in good condition but that do not appreciably prolong the life or increase the value of the property.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Sep. 30, 2021
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 788,457		$ 788,457		$ 764,394
Less: accumulated depreciation	(393,167)		(393,167)		(389,406)
Property, plant, and equipment, net	395,290		395,290		374,988
Depreciation and amortization	20,722	$ 18,769	40,042	$ 37,280
Maintenance and repair expense	7,475	$ 4,754	13,594	$ 9,962
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	395,017		395,017		388,352
Land and buildings
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	77,498		77,498		70,048
Construction in process
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	62,142		62,142		59,737
Rental equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 253,800		$ 253,800		$ 246,257