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EMPLOYEE BENEFIT PLANS, AMOUNTS EXPECTED TO BE RECOGNIZED IN NET PERIODIC BENEFIT COST (Details) $ in Thousands | 12 Months Ended
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Sep. 30, 2015 USD ($)
Pension [Member] |
Regulatory Assets |
Net actuarial loss | $ 5,606
Prior service cost (credit) | 108
Total | 5,714
Accumulated Other Comprehensive Income (Loss) |
Net actuarial loss | 1,675
Prior service cost (credit) | 3
Total | 1,678
OPEB [Member] |
Regulatory Assets |
Net actuarial loss | 3,175
Prior service cost (credit) | (311)
Total | 2,864
Accumulated Other Comprehensive Income (Loss) |
Net actuarial loss | 99
Prior service cost (credit) | (54)
Total | $ 45

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