Commitments (Rent Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Leases, Operating [Abstract]
Rentals	$ 2,591	$ 2,967	$ 3,053
Less: sublease rentals	(56)	(24)	(31)
Total rental expense	$ 2,535	$ 2,943	$ 3,022