Inventories (Tables)

12 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories comprise the following at September 30:

	2018		2017
Gas Utility natural gas	$	37,287	$	39,486
Materials, supplies and other	15,126		13,823
Total inventories	$	52,413	$	53,309