Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Total tax expense	$ (2,600)
Expense (benefit) from income taxes	(2,540)	$ 616
Tax Credit Carryforward, Amount	1,200
Valuation allowance	$ 66,300