Income Taxes (Schedule Of Components Of Income Tax Provision) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Current:
Federal	$ 18,156	$ 5,470	$ 18,126
State	1,512	939	1,750
Foreign	331	563	1,071
Current income tax provision	19,999	6,972	20,947
Deferred:
Federal	(1,840)	(122)	(1,189)
State	25	(76)	23
Foreign	393	(62)	113
Deferred income tax provision	(1,422)	(260)	(1,053)
Total income tax provision	$ 18,577	$ 6,712	$ 19,894