Inventories (Tables)

9 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories comprise the following:

	June 30, 2018		September 30, 2017		June 30, 2017
Gas Utility natural gas	$	18,608	$	39,486	$	21,826
Materials, supplies and other	16,055		13,823		15,303
Total inventories	$	34,663	$	53,309	$	37,129