Accumulated Other Comprehensive Loss (Changes In Each Component Of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ (15,266)	$ (13,741)
Other comprehensive (loss) income before reclassifications	(2,387)	(303)
Amounts reclassified from accumulated other comprehensive (loss) income	119	(45)
Net current period other comprehensive (loss) income	(2,268)	(348)
Balance	(17,534)	(14,089)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(4,696)	(5,468)
Other comprehensive (loss) income before reclassifications	(2,387)	(317)
Amounts reclassified from accumulated other comprehensive (loss) income
Net current period other comprehensive (loss) income	(2,387)	(317)
Balance	(7,083)	(5,785)
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		14
Amounts reclassified from accumulated other comprehensive (loss) income		(89)
Net current period other comprehensive (loss) income		(75)
Balance		184
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	119	44
Net current period other comprehensive (loss) income	119	44
Balance	$ (10,451)	$ (8,488)