Retirement Plans (Schedule Of Components Of Net Periodic Benefit Cost For Plans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Retirement Plans [Abstract]
Interest cost	$ 905	$ 969	$ 1,810	$ 1,897
Expected return on assets	(1,021)	(1,054)	(2,042)	(2,086)
Amortization of Prior service cost	3	3	6	6
Amortization of Actuarial loss	363	241	726	597
Net periodic benefit cost	$ 250	$ 159	$ 500	$ 414