Income and other Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income tax expense	$ 155	$ 396			$ 153	$ 2,308
Income tax expense, discontinued operations	$ (200)		$ 2,100		$ (200)	$ 28,100
Effective tax rate	(48.90%)			(29.30%)	(34.10%)	(36.10%)
Income tax penalties and interest accrued	$ 400				$ 400		$ 300