Accrued Expenses and Other Current Liabilities (Income and Other Taxes) (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Payables and Accruals [Abstract]
Income tax expense	$ 8	$ (175)	$ 155	$ (2)	$ 339	$ (456)	$ 396	$ 1,912	$ (14)	$ 2,191	$ 24,550
Income tax expense, discontinued operations									$ 24	(26,500)	$ (500)
Deferred income tax benefit from discontinued operations										$ 24,100