Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Sep. 30, 2016
Statement of Financial Position [Abstract]
Receivables, Allowance for Uncollectible Accounts	$ 22,526	$ 21,109
Common Stock, Par Value	$ 1	$ 1
Common Stock, Shares Authorized	200,000,000	200,000,000
Common Stock, Shares Issued	85,543,125	85,118,886
Common Stock, Shares Outstanding	85,543,125	85,118,886