Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income tax provision	$ 765	$ 381
Income tax benefit specific to the period	100	$ 700
Unrecognized tax benefits that would impact effective tax rate	1,400
Decrease in unrecognized tax benefits that is reasonably possible	$ 400