Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Tax cuts and jobs act of 2017, provisional income tax (expense) benefit			$ 3,641
Estimated annual effective tax rate used to calculate income tax expense (benefit)			22.80%	0.10%
Federal statutory income tax rate, percent	24.50%		35.00%
Effective income tax rate reconciliation, percent	(58.10%)	(87.40%)	9.60%	4.70%
Income tax (benefit) expense	$ (1,433)	$ (12,202)	$ 960	$ (295)
Loss before income taxes	$ 2,468	$ 13,958	$ 10,052	$ (6,255)