Accumulated Other Comprehensive Loss (Changes In Each Component Of AOCI) (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ (15,266)	$ (13,741)
Other comprehensive (loss) income before reclassifications	(871)	1,603
Amounts reclassified from accumulated other comprehensive (loss) income	357	(77)
Net current period other comprehensive (loss) income	(514)	1,526
Balance	(15,780)	(12,215)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(4,696)	(5,468)
Other comprehensive (loss) income before reclassifications	(871)	1,456
Amounts reclassified from accumulated other comprehensive (loss) income
Net current period other comprehensive (loss) income	(871)	1,456
Balance	(5,567)	(4,012)
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance		259
Other comprehensive (loss) income before reclassifications		147
Amounts reclassified from accumulated other comprehensive (loss) income		(334)
Net current period other comprehensive (loss) income		(187)
Balance		72
Pension And Postretirement Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(10,570)	(8,532)
Other comprehensive (loss) income before reclassifications
Amounts reclassified from accumulated other comprehensive (loss) income	357	257
Net current period other comprehensive (loss) income	357	257
Balance	$ (10,213)	$ (8,275)