PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS Part 3 (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Pension Plans [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	$ 384,163	$ 398,360
Service cost	9,203	9,553	8,841
Interest cost	19,358	18,819	19,729
Plan amendments	0	0
Actuarial (gain) loss	52,161	(12,625)
Settlement loss	14,348	746
Gross benefits paid	(67,062)	(30,690)
Benefit obligation at end of year	412,171	384,163	398,360
Accumulated benefit obligation at end of year	353,061	329,594
Postretirement Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	103,991	97,979
Service cost	8,060	7,676	6,442
Interest cost	5,521	4,843	4,515
Actuarial (gain) loss	15,895	(1,159)
Gross benefits paid	(6,250)	(5,348)
Benefit obligation at end of year	$ 127,217	$ 103,991	$ 97,979