Employee Benefit Plans (Schedule Of Changes In Accumulated Postretirement Benefit Obligations, Changes In Fair Falue Of Plan Assets And Funded Status) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Changes in postretirement benefit obligation:
Balance at beginning of year	$ 895	$ 663
Service cost	23	40	33
Interest cost	17	39	39
Actuarial loss (gain)	(189)	248
Benefits paid	(57)	(95)
Balance at end of year	689	895	663
Change in plan assets:
Fair value of assets at beginning of year
Employer contributions	57	95
Benefits paid	(57)	(95)
Fair value of assets at end of year
Reconciliation of funded status:
Unfunded liability	(689)	(895)
Unrecognized prior service cost		(51)
Net actuarial gain	(909)	(827)
Net liability recognized	$ (1,598)	$ (1,671)