Commitments (Rent Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Leases, Operating [Abstract]
Rentals	$ 1,613	$ 2,076	$ 2,606
Less: sublease rentals	(46)	(56)	(24)
Total rental expense	$ 1,567	$ 2,020	$ 2,582