Income Taxes (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Summary of reconciliation of unrecognized tax benefits
Beginning of fiscal year	$ 1,564	$ 1,948	$ 2,042
Increases in tax positions for prior years	5	3
Decreases in tax positions for prior years	(3)	(85)	(104)
Increases in tax positions for current year	72	55	92
Settlements with taxing authorities		(53)
Lapse of the statute of limitations	(203)	(304)	(82)
End of fiscal year	$ 1,435	$ 1,564	$ 1,948