Income Taxes (Details 3) (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Reconciliation of the changes in the amount of unrecognized tax benefits
Balance at beginning of the fiscal year	$ 10,836,000	$ 13,647,000
Increases related to prior year tax positions	90,000	166,000
Decreases related to prior year tax positions	(119,000)	(15,000)
Increases related to current year tax positions	171,000	208,000
Settlements	(127,000)	(71,000)
Lapse of statute	(2,910,000)	(3,099,000)
Balance at end of fiscal year	7,941,000	10,836,000
Total unrecognized tax benefits of accrued interest and penalties	$ 3,600,000	$ 4,200,000