PROPERTY, PLANT AND EQUIPMENT

12 Months Ended

Sep. 30, 2022

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPMENT

11. PROPERTY, PLANT AND EQUIPMENT

As of September 30, 2022 and September 30, 2021, property, plant and equipment at cost and accumulated depreciation were as follows:

(in thousands)	September 30, 2022		September 30, 2021
Land	$	22,113	$	23,043
Buildings and related improvements	172,633		136,680
Machinery and equipment	427,460		372,503
Leasehold improvements	10,512		9,720
Software	36,884		28,288
Construction in progress	99,491		43,055
Property, plant and equipment, at cost	769,093		613,289
Accumulated depreciation	(378,873)		(337,667)
Property, plant and equipment, net	$	390,220	$	275,622

Depreciation expense for fiscal years ended September 30, 2022, September 30, 2021 and September 30, 2020 was $48,239, $44,913 and $42,208, respectively.