Computation of Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Current:
Current Federal	$ (16,901)	$ 15,352	$ 31,954
Current Foreign	647	393	(19)
Current State	4	69	124
Total current income tax expenses (benefits)	(16,250)	15,814	32,059
Deferred:
Deferred Federal	964	41	43
Deferred Foreign	(1,907)	777	(566)
Total Deferred Income Tax Expense (benefits)	(943)	818	(523)
Income tax expense	$ (17,193)	$ 16,632	$ 31,536