Inventories (Tables)

6 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Schedule of Inventory

The major classes of inventory, net are as follows:

	September 30, 2017			March 31, 2018
Raw materials and supplies	$	64,113		$	68,350
Work in progress	16,425			21,350
Finished goods and products held for resale	44,402			52,222
Costs of unbilled projects	5,706			5,407
Reserves for excess and obsolete	(10,599		)	(11,078		)
	$	120,047		$	136,251