Income Taxes (Schedule of Components of Income Tax Provision) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Current:
Federal	$ 2,638	$ 12,184	$ 10,919
State	699	2,226	1,757
Foreign	(306)	(130)	1,575
Current income tax provision	3,031	14,280	14,251
Deferred:
Federal	3,296	(1,798)	(580)
State	420	(311)	(114)
Foreign	6,805	(1,103)	(6,170)
Deferred income tax provision	10,521	(3,212)	(6,864)
Total income tax provision	$ 13,552	$ 11,068	$ 7,387