Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income tax benefit, including discontinued operations	$ 4,500		$ 7,100
Benefit from income taxes	4,464	$ 3,898	7,004	$ 3,282
Tax credit			1,300	$ 1,400
Valuation allowance	$ 66,300		$ 66,300