Pension Plans (Components Of Net Periodic Pension Cost) (Details) - Pension Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Interest cost of projected benefit obligation	$ 1,199	$ 1,260	$ 815
Service cost	1,372	1,535	1,696
Expected return on plan assets	(3,728)	(4,180)	(3,327)
Amortization of prior service cost	(5)	(5)	(5)
Recognized actuarial loss (gain)	2,390	2,293	3,385
Settlement loss	(30)	9	0
Net periodic pension cost	$ 1,198	$ 912	$ 2,564