Accumulated Other Comprehensive Loss (Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax [Roll Forward]
Beginning balance			$ (59,971)
Change during the period	$ (569)	$ 2,533	17,565	$ 20,941
Ending balance	(77,536)		(77,536)
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, After Tax [Roll Forward]
Beginning balance			26,866
Change during the period			4,734
Ending balance	31,600		31,600
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			33,105
Change during the period	2,180	$ (676)	(12,831)	$ (15,294)
Ending balance	$ 45,936		$ 45,936