Discontinued Operations and Restructuring - Restructuring Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring	$ 1,921	$ 17,080	$ 6,664
Disposed of by Sale | Restructuring Plan 2015
Restructuring Cost and Reserve [Line Items]
Restructuring	1,921	17,080
Disposed of by Sale | Restructuring Plan 2015 | Long-lived assets impairment
Restructuring Cost and Reserve [Line Items]
Restructuring	0	2,346
Disposed of by Sale | Restructuring Plan 2015 | Other
Restructuring Cost and Reserve [Line Items]
Restructuring	779	3,447
Disposed of by Sale | Restructuring Plan 2015 | Asset disposals
Restructuring Cost and Reserve [Line Items]
Restructuring	323	3,650
Disposed of by Sale | Restructuring Plan 2015 | Lease termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring	$ 819	$ 7,637