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PROPERTY, PLANT AND EQUIPMENT - NET
 12 Months Ended
Sep. 30, 2024
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT, NET PROPERTY, PLANT AND EQUIPMENT — NET
Property, plant and equipment — net consisted of the following (in thousands):
As of September 30,
20242023
Land and improvements$3,209 $4,829 
Buildings and improvements115,828 129,191 
Manufacturing equipment668,044 631,594 
Computer equipment34,535 32,392 
Furnitures and fixtures7,996 7,290 
Vehicles2,375 1,087 
Total property, plant and equipment831,987 806,383 
Construction in progress59,006 87,348 
 890,993 893,731 
Accumulated depreciation(428,792)(392,708)
Total property, plant and equipment – net$462,201 $501,023 
Depreciation expense was approximately $84.4 million, $81.2 million and $64.5 million in the years ended September 30, 2024, 2023 and 2022, respectively. During the years ended September 30, 2024, 2023 and 2022, $0.6 million, $5.2 million and $5.6 million of interest was capitalized, respectively.