Income Taxes (Details 5) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Income Taxes
Gross unrecognized income tax benefits at beginning of year	$ 4,872,000	$ 8,312,000	$ 11,843,000
Changes based on tax positions related to the current year	0	(370,000)	(872,000)
Increases for tax positions related to prior years	1,214,000	560,000	4,915,000
Reductions for tax positions related to prior years	(1,439,000)	(2,073,000)	(5,365,000)
Settlements	(16,000)	(65,000)	(1,720,000)
Lapse of statute of limitations	(79,000)	(1,492,000)	(489,000)
Gross unrecognized income tax benefits at end of year	4,552,000	4,872,000	8,312,000
Released liabilities for interest and penalties	300,000	400,000	3,400,000
Interest and penalties accrued	2,600,000
Tax audit by IRS year under examination	2009
Unrecognized tax benefits that would impact effective tax rate	4,800,000
Reversal of unrecognized tax benefits in discontinued operations resulting from IRS audit	$ 2,700,000