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Inventories
 6 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]  
Inventories Inventories
The major classes of Inventories, net are as follows:
March 31,
2021		September 30,
2020
Raw materials and supplies$82,065 $78,319 
Work in progress19,497 15,654 
Finished goods and products held for resale61,918 56,435 
Costs of unbilled projects4,143 3,438 
Reserves for excess and obsolete
(10,836)(11,467)
Inventories, net
$156,787 $142,379