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Income Taxes - Schedule of Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Income Tax Disclosure [Abstract]
Computed expected income tax expense	$ 4,419	$ 4,812	$ 5,750
State income taxes, net of federal benefit	970	221	242
Transfer of deferred tax liabilities with subsidiaries sold	(841)
Permanent differences	122	131	(76)
Tax credits	(2,013)
Total income tax expense	$ 2,657	$ 5,164	$ 5,916

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Amount of current and deferred federal income tax expense (benefit) attributable to income (loss) from continuing operations.

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