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PROPERTY, PLANT AND EQUIPMENT
 6 Months Ended
Mar. 31, 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 March 31, 2021At September 30, 2020
Land, building and building improvements$169,081 $167,005 
Machinery and equipment611,187 595,126 
Leasehold improvements53,952 53,386 
834,220 815,517 
Accumulated depreciation and amortization(493,215)(471,553)
Total$341,005 $343,964 

Depreciation and amortization expense for property, plant and equipment was $13,450 and $13,316 for the quarters ended March 31, 2021 and 2020, respectively, and $26,338 and $26,748 for the six months ended March 31, 2021 and 2020, respectively. Depreciation included in Selling, general and administrative ("SG&A") expenses was $5,014 and $4,910 for the quarters ended March 31, 2021 and 2020, respectively, and $9,720 and $9,861 for the six months ended March 31, 2021 and 2020, respectively. Remaining components of depreciation, attributable to manufacturing operations, are included in Cost of goods and services.