Inventories (Tables)

6 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories comprise the following:

	March 31, 2018		September 30, 2017		March 31, 2017
Gas Utility natural gas	$	3,459	$	39,486	$	2,394
Materials, supplies and other	16,258		13,823		14,780
Total inventories	$	19,717	$	53,309	$	17,174