Comprehensive Income and Capital Structure (Details 1) $ in Thousands	6 Months Ended
	Mar. 31, 2016 USD ($)
Foreign Currency Translation
Balance at September 30, 2015	$ (19,293)
Other comprehensive income (loss) before reclassifications	1,757
Reclassifications out of other comprehensive income	0
Balance as of March 31, 2016	(17,536)
Derivative Financial Instruments
Balance at September 30, 2015	(1,427)
Other comprehensive income (loss) before reclassifications	0
Reclassifications out of other comprehensive income	801
Balance as of March 31, 2016	(626)
Accumulated Other Comprehensive Loss
Balance as of September 30, 2015	(20,720)
Other comprehensive income (loss) before reclassifications	1,757
Reclassifications out of other comprehensive income	801
Balance as of March 31, 2016	$ (18,162)