PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS Part 6 (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Sep. 30, 2012
Pension Plans [Member]
Pre-tax amounts are expected to be amortized from accumulated other comprehensive income [Abstract]
Amortization of net actuarial loss	$ 11,356
Amortization of prior service cost	544
Sub-total	11,900
Regulatory adjustment	(11,538)
Total Expected to be Amortized	362
Postretirement Benefit [Member]
Pre-tax amounts are expected to be amortized from accumulated other comprehensive income [Abstract]
Amortization of net actuarial loss	5,300
Amortization of prior service cost	3
Amortization of transition obligation	93
Sub-total	5,396
Regulatory adjustment	(5,396)
Total Expected to be Amortized	$ 0

The amounts in accumulated other comprehensive income related to gains and losses that are not recognized immediately and are expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

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The amounts in accumulated other comprehensive income related to prior service cost or credit expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

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- Definition

The amounts in accumulated other comprehensive income related to transition assets (obligations), origination from the adoption of FAS 87 and 106, expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

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- Definition

The aggregate amount in accumulated other comprehensive income expected to be recognized as a component of net periodic benefit cost over the fiscal year that follows the most recent annual statement of financial position presented, including the net gain (loss), net prior service cost or credit, and net transition asset or obligation.

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