Computation of Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Current
Current Federal	$ (13,726)	$ (16,901)	$ 15,352
Current Foreign	148	647	393
Current State	6	4	69
Total current income tax expenses (benefits)	(13,572)	(16,250)	15,814
Deferred:
Deferred Federal	2,881	964	41
Deferred Foreign	1,328	(1,907)	777
Total Deferred Income Tax Expense (benefits)	4,209	(943)	818
Income tax expense	$ (9,363)	$ (17,193)	$ 16,632