PENSION AND OTHER POSTRETIREMENT PLANS - Changes in Fair Value of Level 3 Plan Assets (Details) - Pension - USD ($) $ in Thousands |
12 Months Ended | |
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Sep. 30, 2016 |
Sep. 30, 2015 |
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| Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] | ||
| Fair value, beginning of year | $ 142,225 | $ 131,753 |
| Acquisitions | 0 | 25,897 |
| Fair value, end of year | 151,864 | 142,225 |
| Other investments | Level 3 | ||
| Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] | ||
| Fair value, beginning of year | 13,982 | 14,330 |
| Acquisitions | 0 | 0 |
| Dispositions | (941) | (1,661) |
| Realized Gains | 449 | 608 |
| Unrealized Gains (Losses) | (674) | 705 |
| Fair value, end of year | $ 12,816 | $ 13,982 |
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- Definition Actual return on plan assets, separately identifying the amount related to assets sold during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Actual return on plan assets, separately identifying the amount related to assets still held at the reporting date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of increase in the plan assets attributed to a business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition The amount of decrease in the plan assets attributed to the sale, liquidation, spin-off or other divestiture of a corporate division or subsidiary. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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