Income Taxes (Schedule of Components of Income Tax Provision) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Current:
Federal	$ 12,184	$ 10,919	$ 17,648
State	2,226	1,757	1,513
Foreign	(130)	1,575	331
Current income tax provision	14,280	14,251	19,492
Deferred:
Federal	(1,798)	(580)	(1,853)
State	(311)	(114)	24
Foreign	(1,103)	(6,170)	393
Deferred income tax provision	(3,212)	(6,864)	(1,436)
Total income tax provision	$ 11,068	$ 7,387	$ 18,056