SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES (Details) (Reserves for uncollectible accounts, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2012
Reserves for uncollectible accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balances at Beginning of Year	$ 34,420		$ 30,998		$ 30,737
Charges to Costs and Expenses	6,146		3,436		3,189
Deductions from Reserves	1,930	[1]	14	[1]	2,928	[1]
Balances at End of Year	$ 38,636		$ 34,420		$ 30,998

[1] Deductions from reserves include write-off of uncollectible accounts, net of recoveries of accounts previously written-off.