SCHEDULE II - Valuation and Qualifying Accounts (Details) (USD $)	12 Months Ended
	Sep. 30, 2014 Allowance for doubtful accounts	Sep. 30, 2013 Allowance for doubtful accounts	Sep. 30, 2012 Allowance for doubtful accounts	Sep. 30, 2014 Valuation allowance	Sep. 30, 2013 Valuation allowance	Sep. 30, 2012 Valuation allowance	Sep. 30, 2014 Stock Based Compensation	Sep. 30, 2013 Stock Based Compensation	Sep. 30, 2012 Stock Based Compensation	Sep. 30, 2011 Stock Based Compensation
Valuation and Qualifying Accounts Disclosure [Line Items]
Overstatement (Understatement) of Deferred Tax Asset Valuation Allowance								$ 9,100,000	$ 9,400,000	$ 8,100,000
Deferred Tax Asset, Change in Amount							(9,100,000)
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	0	258,000	2,212,000	68,802,000	102,408,000	92,671,000
Charged to Cost and Expenses	0	(142,000)	(1,954,000)	6,287,000	(487,000)	(1,147,000)
Charged to Other Accounts	0	0	0	0	0	0
Deductions/Write-offs	0	(116,000)	0	(10,335,000)	(33,119,000)	10,884,000
Balance at End of Year	$ 0	$ 0	$ 258,000	$ 64,754,000	$ 68,802,000	$ 102,408,000