Commitments and Contingencies (Details) (USD $) In Thousands	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Commitments And Contingencies Details [Abstract]
Rent Expense	$ 4,259	$ 4,051	$ 3,968
Operating Lease Obligations [Abstract]
Future Minimum Payments (2012)	3,286
Future Minimum Payments (2013)	3,135
Future Minimum Payments (2014)	2,387
Future Minimum Payments (2015)	2,073
Future Minimum Payments (2016)	2,042
Future Minimum Payments Thereafter (After 2016)	9,414
Future Minimum Payments, Total	22,337
Capital Lease Obligations [Abstract]
Future Minimum Payments Due (2012)	909
Future Minimum Payments Due (2013)	284
Future Minimum Payments Due (2014)	55
Future Minimum Payments Due (2015)	15
Future Minimum Payments Due (2016)	0
Future Minimum Payments Due Thereafter (After 2016)	0
Future Minimum Payments Due, Total	$ 1,263