Consolidated Statements Of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Consolidated Statements Of Comprehensive Income (Loss) [Abstract]
Defined benefit pension and postretirement plans activity, tax	$ 1,291	$ 418	$ 2,152
Unrealized gains/(losses) on available-for-sale securities, tax	34	(17)	4
Foreign currency translation adjustment, tax	$ (1,725)	$ 1,602	$ 1,188