Goodwill and Other Intangible Assets - Classification of Amortization Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense in continuing operations	$ 4,742	$ 3,875	$ 3,426
Amortization expense in discontinued operations	2,055	2,397	3,867
Operations expense	87	103	111
Total expense from the amortization of definite-lived intangible assets	$ 6,884	$ 6,375	$ 7,404