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Income Taxes (Schedule of Components of Income Tax Provision) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Current:
Federal	$ (1,395)	$ 2,638	$ 12,184
State	449	699	2,226
Foreign	899	(306)	(130)
Current income tax provision	(47)	3,031	14,280
Deferred:
Federal	1,923	3,296	(1,798)
State	47	420	(311)
Foreign	360	6,805	(1,103)
Deferred income tax provision	2,330	10,521	(3,212)
Total income tax provision	$ 2,283	$ 13,552	$ 11,068

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