Income Taxes (Details 5) (USD $)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Income Taxes
Gross unrecognized income tax benefits at beginning of year	$ 4,552,000	$ 4,872,000	$ 8,312,000
Changes based on tax positions related to the current year	0	0	(370,000)
Increases for tax positions related to prior years	0	1,214,000	560,000
Reductions for tax positions related to prior years	0	(1,439,000)	(2,073,000)
Settlements	0	(16,000)	(65,000)
Lapse of statute of limitations	(55,000)	(79,000)	(1,492,000)
Gross unrecognized income tax benefits at end of year	4,497,000	4,552,000	4,872,000
Released liabilities for interest and penalties	100,000	300,000	400,000
Interest and penalties accrued	2,700,000
Unrecognized tax benefits that would impact effective tax rate	4,600,000
Unrecognized income tax benefits that may be released within next 12 months	$ 1,000,000