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PROPERTY, PLANT AND EQUIPMENT
 9 Months Ended
Jun. 30, 2021
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT PROPERTY, PLANT AND EQUIPMENT
The following table details the components of property, plant and equipment, net:
At June 30, 2021At September 30, 2020
Land, building and building improvements$169,588 $167,005 
Machinery and equipment615,780 595,126 
Leasehold improvements55,507 53,386 
840,875 815,517 
Accumulated depreciation and amortization(502,113)(471,553)
Total$338,762 $343,964 

Depreciation and amortization expense for property, plant and equipment was $13,371 and $13,142 for the quarters ended June 30, 2021 and 2020, respectively, and $39,709 and $39,890 for the nine months ended June 30, 2021 and 2020, respectively. Depreciation included in Selling, general and administrative ("SG&A") expenses was $5,044 and $4,852 for the quarters ended June 30, 2021 and 2020, respectively, and $14,764 and $14,713 for the nine months ended June 30, 2021 and 2020, respectively. Remaining components of depreciation, attributable to manufacturing operations, are included in Cost of goods and services.