Employee Benefit Plans (Schedule Of Net Funded Status) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Benefit obligation at end of year	$ 36,436	$ 31,714
Fair value of plan assets at end of year	22,675	20,540
Pension Benefits [Member]
Benefit obligation at beginning of year	31,714	28,839
Service Cost	0	0	0
Interest Cost	1,442	1,454	1,440
Actuarial loss	4,293	2,302
Benefits paid	(1,013)	(881)
Benefit obligation at end of year	36,436	31,714	28,839
Fair value of plan assets at beginning of year	20,540	21,513
Actual return on plan assets	2,775	(408)
Employer contributions	373	316
Fair value of plan assets at end of year	22,675	20,540	21,513
Funded status at end of year	(13,761)	(11,174)
Other Postretirement Benefit Plans Defined Benefit [Member]
Benefit obligation at beginning of year	1,196	1,114
Service Cost	61	54	52
Interest Cost	53	55	55
Actuarial loss	55	30
Benefits paid	(79)	(57)
Benefit obligation at end of year	1,286	1,196	1,114
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	79	57
Fair value of plan assets at end of year	0	0	0
Funded status at end of year	$ (1,286)	$ (1,196)