Retirement and Other Benefit Plans (Schedule Of Funded Status) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Funded status at end of year	$ (16,500)	$ (30,300)
Accrued benefit cost	(16,500)	(30,300)
Current liability	(200)	(200)
Noncurrent liability	(16,286)	(30,223)
Accumulated other comprehensive (income)/loss (before tax effect)	41,900	47,400
Net actuarial loss	41,900	47,400
Accumulated other comprehensive (income)/loss (before tax effect)	$ 41,900	$ 47,400