SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, DEFINED BENEFIT (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Pension Plans Excluding Pension Equalization Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 20,000	$ 20,000	$ 4,900
OPEB [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 5,977	$ 5,775	$ 6,500