Accumulated Other Comprehensive Loss (Changes In Each Component Of AOCI) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ (4,408)	$ (5,375)	$ (3,240)	$ (4,318)	$ (4,098)	$ (4,578)	$ (7,960)	$ (7,446)	$ (5,934)
Other comprehensive income before reclassifications	(5,937)	459	(2,562)
Amounts reclassified from accumulated other comprehensive income	197	508	427
Net current period other comprehensive income	(5,740)	967	(2,135)
Balance	(10,148)	(4,408)	(5,375)	(4,318)	(4,098)	(4,578)	(7,960)	(7,446)	(5,934)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(383)	1,695	2,081
Other comprehensive income before reclassifications	(2,110)	(2,078)	(386)
Net current period other comprehensive income	(2,110)	(2,078)	(386)
Balance	(2,493)	(383)	1,695
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	132	102	94
Other comprehensive income before reclassifications	161	101	100
Amounts reclassified from accumulated other comprehensive income	(127)	(71)	(92)
Net current period other comprehensive income	34	30	8
Balance	166	132	102
Pension And Postretirement Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(4,157)	(7,172)	(5,415)
Other comprehensive income before reclassifications	(3,988)	2,436	(2,276)
Amounts reclassified from accumulated other comprehensive income	324	579	519
Net current period other comprehensive income	(3,664)	3,015	(1,757)
Balance	$ (7,821)	$ (4,157)	$ (7,172)