Defined Benefit Plans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Pension Plans [Member]
Net periodic pension cost
Service Cost	$ 550	$ 592	$ 1,990	$ 1,824
Interest Cost	1,011	900	2,936	2,656
Expected Return on Plan Assets	(1,007)	(720)	(2,547)	(2,164)
Recognized Actuarial Losses	715	474	1,910	1,314
Amortization of Prior Service Costs	12	15	47	46
Net Periodic Pension Cost	1,281	1,261	4,336	3,676
Supplemental Executive Retirement Plan [Member]
Net periodic pension cost
Service Cost	107	81	327	243
Interest Cost	91	89	276	267
Expected Return on Plan Assets
Recognized Actuarial Losses
Amortization of Prior Service Costs	105	105	315	315
Net Periodic Pension Cost	$ 303	$ 275	$ 918	$ 825